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Header and GMPP Exhaust

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Old Jul 7, 2007 | 08:07 PM
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VaderSS's Avatar
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From: Richmond, VA
Header and GMPP Exhaust

I already have the GMPP Sport Exhaust and I'm looking into getting the header next. Does anybody know what kind of hp I can expect from having the almost complete exhaust system? Just a ball figure, I'm curious. My existing mods are in my vBGarage if anyone needs to know.

p.s. - if I were to get the zzperformance downpipe too, what might I expect?

http://www.zzperformance.com/cobalt_...=540&catid=155

Thanks guys!

Last edited by VaderSS; Jul 7, 2007 at 08:07 PM. Reason: Automerged Doublepost
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Old Jul 7, 2007 | 08:23 PM
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From: Az
I'm going to estimate but i imagine a good 10-15+whp with zzp's 1 3/4th header and 3" downpipe on stock boost. More with S2
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Old Jul 7, 2007 | 09:55 PM
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Why not go with the GMPP manifold? You'll get I believe 5hp... but it'll bolt up with no issued what-so-ever.
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Old Jul 8, 2007 | 12:05 AM
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From: Az
Originally Posted by RaineMan
Why not go with the GMPP manifold? You'll get I believe 5hp... but it'll bolt up with no issued what-so-ever.
Because you don't buy a manifold if you want performance.
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