Stock exhaust vs headers
Thread Starter
Racer
Joined: May 2017
Posts: 495
Likes: 51
From: Woodlands Texas
Stock exhaust vs headers
Has anybody done a comparison between the two? For instance if you were to install HFC's in place of the stock ones and leave the factory manifold in place. It actually looks like the factory would flow pretty good.
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
Like you are talking here if all stock motor you would be good. But with a cam are a blower on the car would go with LT Headers for sure... Robert
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,476
From: South Florida
Long Tube headers will always make more power than OEM manifolds. Even if flow volume was identical(which its not) the increase in power is from the long primaries and the scavenging they cause in the combustion chamber.
Racer
Joined: Apr 2009
Posts: 308
Likes: 89
From: Belmont Ontario
From my experience with 17 GS...
I had Borla x-pipe(no cats) and catless downpipes from stock manifolds.. (aftermarket downpipes).. Car sounded good, good power, car managed to run 9.9 with this setup.. (obviously there was more done to car)
I replaced this setup with longtube headers but with converters, since i was sick off smell.. It resulted in louder car at all times and higher mph in 1/4 ...
It all comes to your goals with car...
I had Borla x-pipe(no cats) and catless downpipes from stock manifolds.. (aftermarket downpipes).. Car sounded good, good power, car managed to run 9.9 with this setup.. (obviously there was more done to car)
I replaced this setup with longtube headers but with converters, since i was sick off smell.. It resulted in louder car at all times and higher mph in 1/4 ...
It all comes to your goals with car...
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
Same tuner and dyno another Z06 M7. Did 636 as well but a different route.
It had an AFE intake, extra coolant tank, and cat removal replacement pipe and upper pulley and Corsa exhaust.
It did 612 rwhp and had KR but went to 636 with some torco.
Now I'm looking for 700 with a TVS 2300 on board.
Last edited by 3 Z06ZR1; Apr 3, 2018 at 04:22 AM.
