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Twin 2 1/2 or twin 3inch exhaust for my 2005 caprice with a 285 clubsport engine in it

Grumpy05

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Twin 2 1/2 inch exhaust or twin 3inch exhaust for my 2005 caprice with a 285 clubsport engine in it ?
 

EYY

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Depends on your budget and what sort of sound you want. Twin 3" with rear resi really booms - they're a loud exhaust even at idle. You won't gain power with twin 3" - it's just a different sound. I'd love a twin 3" but it's just a matter of money, and without a performance increase I woudn't spend the money unless one came up really cheap.

Twin 2.5 will support a stock or even modified ls1 without issue. The 285 engine is the same as a stock ls1. Only difference being the hsv extractors and tune.
 

Grumpy05

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So you would say stick with the twin 2 1/2"? Ive been told to uograde the headers to gain more power too .
 

Grumpy05

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I also heard a 3" wont do much unless other mods have been done aswell
 

EYY

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The only reason you'd go twin 3" with a stock engine is the sound. If money is no object, go the twin 3". Otherwise go twin 2.5.

Headers will do a little - depends on which ones you have to begin with. They drastically change the sound though depending on what you change to.
 

Grumpy05

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What headers would you recommend? I have standard headers .
 

vr304

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4 into 1s for the best sound by far, they are better for top end power also
 

Deuce

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2.5 is your best bet.
I'd only go 3" if planning s/charger in the next 3-6months.
Pick a reputable brand for headers. Headers have a lot to do with power production.
 
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