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After market exhaust manifolds: any power gain?

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Deadly BlaZe

Deadly BlaZe

15+ Year Contributor
1,890
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Oct 2, 2004
Alpharetta, Georgia
Do after market exhaust manifolds give any sort of power gain? What is the purpose of having one if not? Just to prevent from cracking?
 
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Yes they definitely have there benefits, depending which one you get. One with larger runners and collector, will obviously allow more air flow. It can help spool up your turbo faster, it can give you more topend, etc..

Here's some dyno graphs of a cast manifold vs a tubular manifold, on a 16g.
http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/E316G Tubular vs. Cast.JPG
http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/E316G Tubular.JPG
http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/Air Temp vs MAP.jpg

A thread ealier today:
http://www.dsmtuners.com/forums/showthread.php?t=245566
 
Upvote0
blackbyrd said:
Yes they definitely have there benefits, depending which one you get. One with larger runners and collector, will obviously allow more air flow. It can help spool up your turbo faster, it can give you more topend, etc..

Here's some dyno graphs of a cast manifold vs a tubular manifold, on a 16g.
http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/E316G Tubular vs. Cast.JPG
http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/E316G Tubular.JPG
http://www.slowboyracing.com/downloads/dyno graphs/Evo-III-16G/Air Temp vs MAP.jpg

A thread ealier today:
http://www.dsmtuners.com/forums/showthread.php?t=245566
Click to expand...
Thanks :thumb:
 
Upvote0
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