question about cat

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Feb 21, 2007 | 04:19 AM

SuperSilverG13

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notaQQbear

Joined: Feb 2007

Posts: 30

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From: New Jersey

question about cat

I have a brand new DC sports header/downpipe and greddy EVO2 exhaust. Am i losing any power by having a stock cat converter inbetween them. If so what should i be looking at?

Feb 21, 2007 | 06:01 AM

F22B Prelude

Rachel Bilson

Joined: Oct 2005

Posts: 11,230

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From: South Bend/Walkerton, Ind

if its catback you should be alright

But usually a straight pipe yields a little more gain

Feb 21, 2007 | 06:05 AM

SuperSilverG13

Thread Starter

notaQQbear

Joined: Feb 2007

Posts: 30

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From: New Jersey

yeah its a cat-back exhaust

Feb 21, 2007 | 06:51 AM

Lynxx

Methanol Drinker

Joined: Jul 2006

Posts: 134

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From: Dallas, Texas

If your engine is mostly stock (just bolt-on mods) then you are better off having some restriction in the exhaust.

Feb 21, 2007 | 10:24 AM

Snoopy

been there done that

Joined: Jun 2002

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From: 916

the stock cat doesnt become a restriction until the engine is movie lots of air

Feb 21, 2007 | 05:47 PM

Lynxx

Methanol Drinker

Joined: Jul 2006

Posts: 134

Likes: 0

From: Dallas, Texas

Quote:

Am i losing any power by having a stock cat converter inbetween them. If so what should i be looking at?

If your engine is mostly stock (just bolt-on mods) then you are better off having some restriction in the exhaust.

Quote:

the cat doesnt become a restriction until the engine is movie lots of air

Perhaps, but as compared to a high-flow catalytic converter, and the exhaust mods already in place, the stock unit is going to give better restriction. Geez...