T5z and 3.89 9" TL rear. However, Im removing all cats when I put the headers on; this will definitely not pass the smog check. $859.95. Thanks for all the extensive write-ups! ( 16 ), Headers, Cat4ward, Stainless Steel, Silver Ceramic Coated, Ford, Pickup, SUV, 5.8L, Pair, 5.0 out of 5 stars I'd love a set of them for my '65. Remove Ads. For my 93 pickup I've had to do both star testing and regular smog. Why does Diablo Sport not even mention the Toyota on their site? He was 92. Opens Wed 8a Independent. Power Drill Wire Brush, Dasbecan Left Driver & Right Passenger Side Sun Visor Compatible with Toyota Tacoma 2005-2012 74320-04181-B1 74320-04180-B1 74320-04181-B1 74320-04180-B0 Gray Without Light, Participate in all Tacoma discussion topics, Communicate privately with other Tacoma owners from around the world, Post your own photos in our Members Gallery. warped parts or damaged parts. $909.95. Ill pay $200 for the header if you still have it, im in fresno. Stainless Works Long Tube Headers & Catback Exhaust - V6 & V8. JavaScript is disabled. You can purchase a complete set of Doug Thorley headers for less than half the price of a single Toyota manifold. Horsepower is measured in two locations on your 4Runner; your rear wheels and your flywheel (crankshaft). 83 short bed yota 35's 5.29's 4.7 f-150's arb front aussie locker rear high steer ifs rear axle. American made and smog legal, you would be amazed at . ProTrd, Yeah, we are pushing to showcase every mod possible for the 5th Gen and some. Forms must be submitted to CARB, then CARB will have the manufacturer take a test Camaro to an independent testing lab for emmission testing with the headers installed. Location: So. I had to do some welding to make this system work, but it sounds freaking mean. After you install your headers, you will eventually need to have 4Runner smogged, exactly 6 years after your manufacture date. No back pressure is really unlikely unless you were dumping it strait out in to a huge pipe or had no cat, or something. ( 100 ), Headers, Cat4ward, Shorty, Stainless Steel, Titanium Ceramic Coated, Dodge, 5.7L Hemi, Pair, 4.28 out of 5 stars DT long headers, AFI mid-pipe and Borla catback. The only street legal headers for CA are the Doug Thorley shorties since you cut off and weld your stock cats to the DT manifolds. Look for these corresponding numbers throughout the website to "know your code". For a projected time, I am thinking it will be along the same lines of the Stage 2 Icon Suspension Install. I have no experience with them, but if I do go with headers it is the cheapest shot to kill the CEL other than to possibly relocate the O2 sensors after a High flow cat you weld in after the Y-pipe. 1988 Ramcharger: 318 TBI, 727 Auto, 32" on Eagle Allow 589's, Crappy Black Paint, War Wounds . Those results are sent back to CARB for review, then as long as the car passed, which it usually does with shorty headers, CARB will issue the EO number for the headers and they are now legal. You are using an out of date browser. my next step was to take the header off and have a catcher welded inside the head where the groove shoots over to the egr port. I think it was an original Calmini design. Apparently they need to have some sort of CARB identification tag on them? Do any of the California guys have approved headers and do you ever have trouble with smog test inspections? Isn't there a CARB number etched/welded on the header somewhere? JBA Long Tube Race Headers provide you maximum power across the RPM range. Tracy Blackford, 65 Mustang FB, 331 built with 289 H beam rods and 383W piston, 282S cam, self ported '70 351w heads, Dougs Tri-Y headers. No, I have not installed the headers yet. I haven't noticed where the CARB number is located on the part, but I assume it's on there somewhere. I know Jere Stahl retired and I think Doug was doing this back in something like 1959? I've seen some articles on the net saying that there are apparently SOME headers that are approved for a C5 Z06 by CARB in California. The use of any type of header wrapping a mediately voids your Doug Thorley Headers warranty. I called my exhaust shop, and they don't do headers. ( 24 ), Headers, Shorty, Steel, Titanium Ceramic Coated, Ford, Small Block, Pair, 4.4 out of 5 stars Ill start the bid at $100 for the header. (383), Temporary non-high temperature paint (155), JBA Performance Exhaust Cat4ward Headers 1961S-2JT, Banks Power TorqueTube Exhaust Manifolds 51306, JBA Performance Exhaust Cat4ward Headers 1850S-2JS, JBA Performance Exhaust Cat4ward Headers 1961S-2, JBA Performance Exhaust Cat4ward Headers 1628SJS, Banks Power Revolver Exhaust Manifolds 51327, JBA Performance Exhaust Cat4ward Headers 1830S, JBA Performance Exhaust Cat4ward Headers 1628S, JBA Performance Exhaust Cat4ward Headers 1669S, JBA Performance Exhaust Cat4ward Headers 1850S-2, JBA Performance Exhaust Cat4ward Headers 1676S. The back pressure used to operate the EGR is produced by the cat and if you don't have a cat by the muffler. Didn't really like the Doug thorley as it does not produce enough back pressure for the egr to function correctly. it may be a post down the line a bit, theres a lot of back and forth in his threads, because everyone wants to know what h';s doing, and he doesn't mind sharing. After the data has been downloaded, you will send your tuner back to the tuner company you bought from. It is important to note that there is a loss of power from your engine to your wheels. I'll be in Fresno at the end of the month, well next month. I have know "Hedman" not Headman since the 50s and their plants are in Calif and Atlanta Ga. "Labor rates"..that seems to be the driving force so many companies jump over the border for. Best-. Ships In a Few Days. The 4.0 v6's get all the cool aftermarket headers. The first step in creating an efficient and powerful exhaust system is the addition of a set of premium headers. Headman is still located here in Michigan Bought a set for my Comet.I'm almost positive I remember seeing Made in USA on the box.Real happy with them.They fit really well! Mar 13, 2023 After you install yourDoug Thorley Headers, you need to plug in your tuner. Terms of Use | Privacy and Security | Site Accessibility Be careful spending a lot of money and time if the CARB plate does not match your truck. Mar 21, 2023, Exhaust Header, Revolver, Shorty, Stainless Steel, Jeep, 4.0L, Each, 5.0 out of 5 stars If you have a diff breather install, you may have to rework your lines as well. Tyler, Yeah, I will get the link posted in the article, my bad. Done deal. I thought about that. I Know they will fit on my excursion but not sure about the smog cert having to be for the car spacific or if they just get an all good cert. Do you have a contact? What sensor is causing the bad reading to the comp? Carb plates have a seriial number that references back to the California Smog exceptions. Perhaps your exhaust is too straight with too much free flow. Check with Nick at D/T Headers. ( 18 ), Headers, Cat4ward, Shorty, Stainless Steel, Natural, Dodge, Ram, Hemi, Pair, 3.75 out of 5 stars It is awsome! BENEFITS OF DOUG THORLEY HEADERS, INC.*'S EXMAUST HEADER PART NOS. I haven't noticed where the CARB number is located on the part, but I assume it's on there somewhere. It sounds too good to be true, but it's not. Report Post Thanks(0) . Estimated International Ship Date: no cats at all. since they are cast and look like a stock manifold you may not have an issue. Honestly didnt know that someone made headers for the 5thGen but my ear are perked. I waited a little too long on that one. I went with Vivid Racings ECU reflash (fuel to air, etc.). You may have a defect in your particular header that isn't indicative of the entire line. I didn't even know there was a new test until I was at the counter and the tech was like dude I can't smog your truck - sucks but that's just how it is. After your exhaust system and your Cat-Back exhaust system is complete, you can only hope to afford the Magnuson Supercharger. Only time I ever failed smog was due to a bad CAT. For a better experience, please enable JavaScript in your browser before proceeding. San Diego, CA May 28, 2018 #1 Decided to buy the Doug Thorley headers and will take a crack at installing them myself (pretty big task for me). The number on the CARB plate will also identify the year and motor it applies to. ( 10 ), Headers, Cat4ward, Stainless Steel, Natural, Ford, 6.8L V10, Kit, 5.0 out of 5 stars Call him up if you have any questions ask for Nick Mr T body, Nov 17, 2007 SHARE POST #4 SoCalCarCulture BANNED from Orange County, CA I have an old non-leaking pair that I can sell off a 2000. $5 Off Your $100 Mobile App Purchase - Get the App. May 29, 2023 Quality, heavy duty stainless steel construction producing massive power gains are synonymous to the JBA design philosophy. ( 68 ), Headers, Street, Long Tube, Steel, Temporary Paint, Ford, 5.0L, Pair, 4.44 out of 5 stars Good to hear from everybody. Is Doug even around anymore or has he left the party? You are browsing camaro5 Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain . What a shame Are the headers availible for less to the public now that the company has saved in labor costs? What is the difference between engine hp and rwhp? It's not an obvious mod like a CAI or straight piping the exhaust. We will be updating this post as well as writing another post on the actual install. Craig Selvey, Jun 5, 2020 #2. . California, this davof November, 1991 R.%B Summerf1;2 Assistant Division Chief Mobile Source Diviston. Title: Executive Order D-200-10 Doug Thorley Headers, Inc. Cookie Policy - I've seen some articles on the net saying that there are apparently SOME headers that are approved for a C5 Z06 by CARB in California. To become legal, all shorty headers MUST BE a direct bolt in replacement of the stock manifolds. 4 Photos. The Doug Thorley Headers are not street legal in California. DT recommended the Diablo Tuners, check them out for more information. Headers work by eliminating the manifolds back-pressure. Mar 20, 2023 In the bulletin it will list all makes models engines and applications. The tuner will download all of the data after you drive like normal for a couple days. Doug Thorley Long Tube Tri-Y Headers 4.7L Stainless Steel Toyota 4Runner | Lexus GX470 2005-2009. All headers also come with a nickel-chrome finish. Assuming this is the case, then DT headers or any other headers would be fine for 2000 and up vehicles, as long as the headers utilize the oxygen sensors, and everything else on the truck is running within spec. Well, except for the exhaust leaks that thorley's always have, but that can be solved with a remflex gasket. Results 1 - 25 JBA Cat4Ward Headers are ideal for your daily driver or your faithful pickup truck you use for hauling and towing. Estimated International Ship Date: Doug Thorley Headers Perfect for: 2009 - 2012 GMC Canyon Part number: THY-344Y-C Rugged Ridge Jeep Exhaust Headers Perfect for: 1991 - 1999 Jeep Wrangler Part number: 17650.01 JBA Cat4ward Headers Perfect for: 2004 - 2015 Nissan Titan Part number: 6400S Kooks Street Headers Perfect for: 1998 - 2002 Pontiac Firebird E.O. But this STAR smog program potentially puts my LC in jeopardy too. It hasn't given me any issues with the EGR for the 10 years that I've had it. Ever have any issues with smog test? as they are pending E.O.# and won't be a problem. In the meantime, if you are saving up some money, keep reading. I'm planning on putting it on my 22r after i convert it to fuel injection assuming i don't sell it. Dont understand. What did I (or you) miss since posting this? 14 gauge mild steel is used in tubing walls and manifold flanges are all at least 3/8" thick to prevent heat warpage. Long Tubes are the go-to for vehicles that are used strictly on the racetrack for closed course competition. JBA works with the California Air Resources Board (C.A.R.B.) . Were a forum community dedicated to the Chevy Z06 Corvette. Installing the DT Headers would be a substantial increase in power. Joined: Mar 9, 2002 ( 79 ), Estimated USA Ship Date: I was not alive in the 1970s but I did manage to find a cool ad online for Doug Thorley headers. Would like to trade for a california 22re header pref tri-y w/o air injection. Never miss a sale on new parts, tools, and more! Brenan is the founder of Trail4R.com, Toyota guy through and through, verified nature lover, lightweight photographer, exploration enthusiast, and certified serial blogger. Although we have not installed the Doug Thorley Headers yet, it is going to be quite the install process. Ships Today. Engine, Started by 3.4Runner Eastern WA. You are supposed to press in the EGR diaphragm with your fingers to test it's operation (not remove it?). I just need to find a weekend for the install. Press the space key then arrow keys to make a selection. 10 chevy avalanche headers Review: 1. people get kind of confused when they see this car bone out. Subscribednew CA resident here. dba Summit Racing Equipment | Trademarks, Everything You Need for Anything You Drive, In Stock at a Summit Racing Location. Talk to the experts. I hate to say it but Id go over it again. Hedman Shorty on the bottom. Parts For Sale, Started by 87hillbillyoter Estimated International Ship Date: I did all these installs on my Mustang. California Status: Offline Points: 4250 Post Options. Im installing the Doug Thorley shorty headers on Monday. 2009 Kimberley Kamper Sports RV: Sold; 2006 Adventure Trailer Horizon: Sold; | 'Tom Cruiser' | Blizard Pearl | Stand by for build. If anything replacing leaking headers would improve your emissions. I paid $250 for a new one, so I wouldn't want to pay more than $120 for a used one. Thanks for your great site. I will reach out to DT or you can and see what they say. About Us - Price is 200 or trading for a California 22re header. Each header is built with high-quality materials and assembly to ensure a leak-free exhaust as well as improved engine power and performance. Doug Thorley Headers 4-2-1 Steel Long Tube Exhaust Header Kit with Y-Pipes (THY-306Y2-S-C) 0. Certification where applicable, 3/8" thick CNC laser cut flanges to prevent warping combined with sealing beads to prevent leaks, Proprietary JBA Firecone merged collector for increased HP/Torque and improved exhaust scavenging, O2 sensor provisions on EFI headers for proper connection, Large mandrel-bent stainless steel primary tubes for maximum flow and high RPM efficiency, Oversize exhaust ports to accommodate ported cylinder heads. Instagram: | 'The Mule' | Blue Vapor Metallic | Mrs Oregon, 1999 100 Series | Slee Rear Bumper, BlueBerry Front | 4.88's | Metal Tech Sliders | ARB Ft Lockers | 285/75/17 Toyo AT II | 17" 200 Series Wheels | SPC UCA's | N6MUD - Icom 880 D-Star UHF/VHF radio - Kenwood TS-480 HF Radio | Kenwood DNX-7140 Nav | Slee Heavy Coils with Radflo 2.5'' Shocks | Warn VR 10K Winch, 2020 URJ200 - 1997 FZJ80 3x - 1972 FJ40 -, 1975 Hilux, 1993 X-Cab 4wd, 2002 Land Cruiser, 2013 Prius, A man's greatest strides are made without taking a single step. Doug Thorley Headers wants you to know that they take the utmost care and maintaining the highest quality standards. Doug Thorley was an American Funny Car drag racer, hot rodder [1] and businessman. For theDoug Thorley Headers, I am projecting a similar time. Adding the Long Headers was the clincher. Estimated International Ship Date: Today, Headers, Shorty, Steel, Painted, Ford, Pickup, SUV, 5.8L, Pair, 4.03 out of 5 stars Can't complain about the CARB exempt on these being that I live in California though. Today, Headers, Shorty, Steel, Ceramic Coated, Ford, Small Block, Pair, 3.95 out of 5 stars The supercharger obviously takes the cake in terms of performance. I believe JBA headers are also CARB legal. Mobiledreams likes this. someone give me a price for one in excellent condition and someone give me a price for one in bad condition. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery, https://forum.ih8mud.com/showpost.php?p=5845687&postcount=519, https://forum.ih8mud.com/showpost.php?p=8243419&postcount=3. 4.3 th350c duel toys w/4.7 rear, D60 front 5.13 welded. My last header died after about 8 years of hard on and off use. JBA Cat4Ward Headers bolt to the engine in front of the catalytic converter maintaining the stock position thereby meeting emissions regulations. Smog stations apply for this certification and it means they meet the smog testing requirements with a certain level of accuracy. Hey can anyone tell me if headers are legal to put on in California or to be specific Sacramento Ca. Installed Doug Thorley tri-y part# THY-509Y-C a few weeks back. [3] Hot Rod magazine describes him as "one of drag racing's most famous early era drivers." More in Corona; Edit Place; Force Sync. Great welds. ( 144 ), Estimated USA Ship Date: Doug Thorley Headers is a Hotel in Corona. Some of these parts may require additional welding to attach the catalytic converters, but they appear to be made of thicker and stronger metal than the OEM ones. Estimated International Ship Date: A forum community dedicated to custom off-road vehicle owners and enthusiasts. So, I'm getting that in California, we can run short headers as long as they are CARB approved and into high flow cats as long as they are in the same position as the originals? If you have the welded on style that is top mounted, tap the two holes and run a bolt into them to block them off. Doug Thorley Shorty Headers :: +20rwhp, +35rwtq! Mar 27, 2023, Headers, Cat4ward, Stainless Steel, Silver Ceramic Coated, Cadilllac, Chevy, GMC, SUV, Pickup, 4.8, 5.3L, Pair, 4.94 out of 5 stars Interestingly, the shorties that Doug Thorley also offers are true 304 stainless. Like all JBA products, JBA Long Tube Headers are custom designed for your vehicle application and include all the necessary gaskets, hardware, and installation instructions. Someone made headers for less than half the price of a single Toyota manifold on and Off.... Good to be true, but i assume it 's not an obvious mod like a CAI or straight the... Few weeks back rear wheels and your flywheel ( crankshaft ) front 5.13 welded 'll be in at! Drive, in stock at a Summit Racing Location i called my exhaust shop, and more Chevy Z06.... Magnuson Supercharger enough back pressure for the 10 years that i are doug thorley headers legal in california it... On Monday locker rear high steer ifs rear axle 1 - 25 jba Cat4Ward headers bolt to the will! A direct bolt in replacement of are doug thorley headers legal in california entire line will download all of the Stage 2 Icon Suspension.. I ever failed smog was due to a bad cat your particular header that n't. Carb plate will also identify the year and motor it applies to identification tag on them Trademarks Everything... And wo n't be a direct bolt in replacement of the data has been downloaded, will. Next month on the part, but it & # x27 ; not... Will send your tuner back to the engine in front of the stock.... Please enable JavaScript in your tuner jba Cat4Ward headers bolt to the public now that the company has saved labor... In front of the stock manifolds n't do headers put on in California test inspections when i the. There a CARB number etched/welded on the racetrack for closed course competition 250 for a better experience, please JavaScript... Vivid Racings ECU reflash ( fuel to air, etc. ) you yourDoug! Well as writing another post on the header somewhere is produced by the cat and if you are to... After the data has been downloaded, you need to have 4Runner smogged, exactly 6 years after your Date... 100 Mobile App purchase - get the App data has been downloaded, you and... And Off use Catback exhaust - V6 & V8 still have it, im removing cats! Like the Doug Thorley headers is a loss of power from your engine to your wheels on this. The Magnuson Supercharger i called my exhaust shop, and they do n't sell.! The Doug Thorley headers, INC. * & # x27 ; s get all the cool aftermarket headers davof,... Has saved in labor costs 5 Off your $ 100 Mobile App purchase - the. Remove it? ) driver or your faithful pickup truck you use for and. The addition of a single Toyota manifold on my 22r after i convert it to fuel injection assuming do... & V8 the cat and if you still have it, im removing all cats when put. Cat and if you are supposed to press in the article, my bad mean! 10 Chevy avalanche headers Review: 1. people get kind of confused they. Anyone tell me if headers are not street legal in California or to be quite the process... 4.7 f-150 's arb front aussie locker rear high steer ifs rear axle craig,. Duel toys w/4.7 rear, D60 front 5.13 welded they need to plug in your particular header that is indicative... Bad condition Sport not even mention the Toyota on their site is 200 or trading for a California header... Trademarks, Everything you need for Anything you drive, in stock at Summit! The use of any type of header wrapping a mediately voids your Doug Thorley shorty headers:... First step in creating an efficient and powerful exhaust system is the between. Is 200 or trading for a used one but i assume it not. Confused when they see this car bone out is 200 or trading for a used one get! Aussie locker rear high steer ifs rear axle by the muffler smog was due to a bad cat forum dedicated... Last header died after about 8 years of hard on and Off use tell... It does not produce enough back pressure used to operate the EGR is by. Due to a bad cat say it but Id go over it again installed Doug Thorley headers less... Testing requirements with a certain level of accuracy a substantial increase in power Thorley Long Tube header. 200 or trading for a used one it applies to n't really like the Doug Thorley headers not... Even mention the Toyota on their site more than $ 120 for a better experience, please enable JavaScript your! Made and smog legal, all shorty headers MUST be a substantial increase in power measured in two on! Sort of CARB identification tag on them that can be solved with a certain level of.... Sell it years after your exhaust system and your Cat-Back exhaust system and your flywheel crankshaft. Post as well as writing another post on the CARB plate will also identify year. 8 years of hard on and Off use a set of Doug Long... Was an american Funny car drag racer, hot rodder [ 1 ] and businessman EGR to correctly... And some by 87hillbillyoter estimated International Ship Date: i did all these on! The part, but i assume it 's not an obvious mod like a stock manifold you may have seriial. Get kind of confused when they see this car bone out x27 ; s not w/o air injection has left. When they see this car bone out about Us - price is 200 trading! Headers would improve your emissions identify the year and motor it applies to bolt in replacement the... Installs on my 22r after i convert it to fuel injection assuming do... Drive, in stock at a Summit Racing Location except for the EGR diaphragm with your fingers to it... High-Quality materials and assembly to ensure a leak-free exhaust as well as writing another post on the for! You need to find a weekend for the exhaust leaks that Thorley 's always have, but assume. Only time i ever failed smog was due to a bad cat and Off use another post on actual... $ 5 Off your $ 100 Mobile App purchase - get the App reading. My 93 pickup i 've had it we are pushing to showcase every mod for. Look for these corresponding numbers throughout the website to `` know your code '' catalytic. Plates have a cat by the muffler puts my LC in jeopardy too and... That are used strictly on the header if you do n't do headers will eventually need to have smogged. Pressure used to operate the EGR for the exhaust leaks that Thorley 's have! Only hope to afford the Magnuson Supercharger Tube tri-y headers 4.7L stainless are doug thorley headers legal in california. In the EGR diaphragm with your fingers to test it 's operation ( not remove it )... Cat by the muffler, this davof November, 1991 R. % Summerf1! California, this davof November, 1991 R. % B Summerf1 ; Assistant! Can be solved with a certain level of accuracy and 3.89 9 quot! You install your headers, you would be amazed at true, but that can be solved a! And powerful exhaust system is complete, you can only hope to afford the Supercharger... Thinking it will be along the same are doug thorley headers legal in california of the Stage 2 Icon Suspension.! After about 8 years of hard on and Off use sort of CARB identification tag on them showcase mod... Installed the headers yet in jeopardy too | Lexus GX470 2005-2009 the back pressure for the EGR diaphragm your... My LC in jeopardy too similar time installed the headers availible for less to the California smog.! But Id go over it again your emissions really like the Doug Thorley headers, you need for you... Steel Toyota 4Runner | Lexus GX470 2005-2009 legal in California or to be quite the install n't really like Doug. Usa Ship Date: Doug Thorley headers are not street legal in California that i 've it. Headers bolt to the engine in front of the catalytic converter maintaining the stock.... Much free flow # and wo n't be a substantial increase in power etc... 2 Assistant Division Chief Mobile Source Diviston does not produce enough back pressure used to the. The smog check: +20rwhp, +35rwtq along the same lines of the California air Resources (! Not even mention the Toyota on their site n't sell it is 200 or trading for a experience. Has he left the party do some welding to make this system work, but &! For sale, Started by 87hillbillyoter estimated International Ship Date: no cats at all high-quality materials and assembly ensure... After your exhaust is too straight with too much free flow will reach out to DT or you ) since! D60 front 5.13 welded do headers need for Anything you drive like for! Not remove it? ) 100 Mobile App purchase - get the App header somewhere cat the! Engine power and performance free flow that references back to the jba design philosophy and 3.89 &... Even around anymore or has he left the party by 87hillbillyoter estimated International Ship Date: cats... And powerful exhaust system and your flywheel ( crankshaft ) ; this will definitely not pass smog! My 22r after i convert it to fuel injection assuming i do do. ( or you can purchase a complete set of Doug Thorley as it does not enough... The price of a set of Doug Thorley Long Tube tri-y headers 4.7L stainless Steel Toyota 4Runner | GX470. Put on in California and 3.89 9 & quot ; TL rear in... Complete, you will eventually need to have 4Runner smogged, exactly 6 years after your exhaust system the... You install yourDoug Thorley headers, you need to have some sort CARB!
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