Exhaust Suggestions
Burning Brakes
Joined: Aug 2011
Posts: 878
Likes: 2
Headers if you're in a smog state.
http://www.tpis.com/parts/view/57
None smog state.
http://www.tpis.com/parts/view/235
Y-pipe.
http://www.tpis.com/parts/view/257
Corsa exhaust-no drone.....shop around for the best price see if Summit will match
http://www.summitracing.com/parts/cs...model/corvette
http://www.tpis.com/parts/view/57
None smog state.
http://www.tpis.com/parts/view/235
Y-pipe.
http://www.tpis.com/parts/view/257
Corsa exhaust-no drone.....shop around for the best price see if Summit will match
http://www.summitracing.com/parts/cs...model/corvette
Burning Brakes
Joined: Aug 2011
Posts: 878
Likes: 2
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 234
From: Bangkok, Thailand
Technically, headers are illegal "period" unless they are certified. The TPIS headers are designed for the early style EGR tube, so you'd need one of those at least to even come close to being legal.
Aside from that, you'd still be illegal for removing the pre-cats - and that's a Federal requirement, not a state requirement.
To avoid attention and the problems mentioned above, I converted my 91 to use 92 & up LT-1 manifolds. Details here: http://marcmedina.com/LT1manifolds.html and several threads here if you search under my handle.
When you say "exhaust" you really need to quantify that. The best thing you can legally do is a Magnaflow 2.5" mandrel bent catted y-pipe, but they have fitment issues, so be prepared. Also, the outlet sucks - it joins two 2.5" pipes into a single joint that is a little under 2.5", then boinks up to 2 7/8" to go into a 3" rear converter. The air injection tube on the rear converter is also wrong. I'm currently working with Magnaflow on the problems.
After the rear converter you have quite a few choices, but my preference is Flowmaster. You can use the 86-90 cat-back system from them to get the good rear y-pipe assembly.
FYI, the 91 cars had differently shaped inlet pipes on the mufflers, so if you keep the original rear y-pipe, you either need "universal" (extra work to install) or 91 year specific mufflers.
Aside from that, you'd still be illegal for removing the pre-cats - and that's a Federal requirement, not a state requirement.
To avoid attention and the problems mentioned above, I converted my 91 to use 92 & up LT-1 manifolds. Details here: http://marcmedina.com/LT1manifolds.html and several threads here if you search under my handle.
When you say "exhaust" you really need to quantify that. The best thing you can legally do is a Magnaflow 2.5" mandrel bent catted y-pipe, but they have fitment issues, so be prepared. Also, the outlet sucks - it joins two 2.5" pipes into a single joint that is a little under 2.5", then boinks up to 2 7/8" to go into a 3" rear converter. The air injection tube on the rear converter is also wrong. I'm currently working with Magnaflow on the problems.
After the rear converter you have quite a few choices, but my preference is Flowmaster. You can use the 86-90 cat-back system from them to get the good rear y-pipe assembly.
FYI, the 91 cars had differently shaped inlet pipes on the mufflers, so if you keep the original rear y-pipe, you either need "universal" (extra work to install) or 91 year specific mufflers.
Burning Brakes
Joined: Aug 2011
Posts: 878
Likes: 2
Pollution is still worse in Cally than Texas.....btw dumping the requirements on a 25 year old car is a non-starter since most cars that old have gone to the scrap heap anyway...so the impact is minimal...go hug a tree.
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Team Owner
Joined: Aug 2005
Posts: 34,988
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
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St. Jude Donor '09 thru '20
Magnaflow will drone a LOT, and their customer service needs to improve.
... And Dronemaster is the worst...Corsa /Done...
Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 234
From: Bangkok, Thailand
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 26
Likes: 0
Lmao wow, that took a turn I wasn't ready for. I live in North Carolina. I know that after 20 or 25 years its considered a classic and then after 30 or 35 it is vintage. I am not really sure. But what I do know is that in the state of North Carolina any vehicle that is a 1997 or newer requires admisssion inspection. 1996 and older it is just a safety inspection.
Le Mans Master
Joined: Sep 2004
Posts: 6,019
Likes: 568
From: Conroe Texas
if you decide on the borlas, and will entertain used, i have a complete ss exhaust with borlas. from the heads to the tips. front pipe and exhaust manifolds are jet hot coated.
Le Mans Master
Joined: Jul 2009
Posts: 6,381
Likes: 66
From: SF bay area C.A.
C4 of the Year Finalist
I beg to differ on that, I'v seen the black smog hanging over your cities. BTW, go hug a cow and please only hug it.
Burning Brakes
Joined: Aug 2011
Posts: 878
Likes: 2
ROFL! I love cally....all the old clunkers slowly going off to the scrap yard and replaced be new cleaner running cars had more to do with smog reduction than cally's fascist CARB program....seen LA lately? Gonna try to tell me that's clean air? plenty of cars have that crap pulled off and pass a pipe test only to fail your stupid "visual"...as for just hugging things cally is the mecca for doing more than hugging to anything one can think of eh?...how's going broke with with Jerry Brown Part II working out?...we're running a surplus....
