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Old 05-09-2009, 09:57 AM   #1
dermo1989
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Question GM performance headers and exhaust: what kind of performance increase?

Has anyone seen any performance specs. when adding these 2 items?:bangdesk:
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Old 05-09-2009, 11:14 AM   #2
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Nope well find out within 2 months probably when the parts are released
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Old 05-09-2009, 01:51 PM   #3
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honestly wouldnt waste time or money on there shorty headers. any long tubes from kooks, arh, etc will be way better and around the same price.
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Old 05-09-2009, 01:52 PM   #4
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Pacesetters FTW!!!
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Old 05-09-2009, 04:28 PM   #5
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Some of us live in states where ONLY CARB certified parts are allowed...

I did the whole long tube thing on my 1998, but have to change them back to stock manifolds every two year, which sucks (If you have ever changed headers on a 4th Gen in your garage, you will understand)...

The shorty's are CARB certified, but so is the new MagnaCharger 2300 (the only other thing needed is a set of forged pistons)!
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Old 05-10-2009, 07:31 PM   #6
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(the only other thing needed is a set of forged pistons)!
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Old 05-11-2009, 05:24 PM   #7
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Some of us live in states where ONLY CARB certified parts are allowed...

I did the whole long tube thing on my 1998, but have to change them back to stock manifolds every two year, which sucks (If you have ever changed headers on a 4th Gen in your garage, you will understand)...

The shorty's are CARB certified, but so is the new MagnaCharger 2300 (the only other thing needed is a set of forged pistons)!
I've paid $500 in fines for LTs here. As much as I hate to have done it, I just pulled my QTPs because I'm tired of worrying about another ticket. I got some nice barely used Edelbrock shorties, added a Random Technologies 2.5-inch Y-pipe, and called it done. I don't have to swap them out anymore and won't have a problem smogging. Does it sound or run like it had done? No. I'm probably leaving a good 20 RWHP on the table and the sound it so boring now, but I'm glad there are some factory engineered shorties out there for us who don't have a choice.

I'm guessing the shorties probably won't be worth much more than 10 RWHP - maybe 15 with a tune. The catback will probably be close to 5 to 10 RWHP. Bottom line, for both, and a tune, maybe about 25 to 30 RWHP. I think the CAI would definately push it that high.
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Old 05-11-2009, 06:14 PM   #8
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Pacesetters FTW!!!
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Old 05-11-2009, 06:15 PM   #9
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LOL ^ They need to just call these things CA headers
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Old 05-12-2009, 11:37 AM   #10
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GM Peformance Short Tube Headers and Exhaust

Is there an actual performance gain with the short tube hearders vs. the stock headers that the SS / the 6 speed has? As well as the Cat Back Exhaust?

Im trying to keep the car strickly all GM parts but i cant see spending the money on this stuff if there isnt a decent gain in power. I should be getting delivery on my car by the end of the month. Any knowledgewould be apreciated!
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Old 05-12-2009, 11:44 AM   #11
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shorties suck, put them on my GTO... lets just say as soon as I had the cash I went Long Tubes ASAP!!!
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Old 05-12-2009, 11:04 PM   #12
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shorties suck, put them on my GTO... lets just say as soon as I had the cash I went Long Tubes ASAP!!!
What was the difference between the two? Do you have dyno numbers?
Thanks.
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Old 05-13-2009, 09:49 PM   #13
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297/316 stock

309/329 shorties

337/351 LT's
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Old 05-14-2009, 03:43 PM   #14
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Im with shocker on this but to get to the ? at hand I'd say 30rwhp give or take 5
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