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Exhaust question

DLFHUB666

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m1lky

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Hey everyone I'm looking at similar. Catback exhaust.

Factory ls1 vy ss

Only mod is k&n pan filter

In the future I'm keen to get tri-y headers

Can get rage, rps or coby though a mate of mine cheap.

Rps catelog
765cd184-36d4-9879.jpg

I like the look of the 4th one but is twin 3inch too large?
Given that factory is 2.25" (I think) then single 3 is actually smaller cross sectional area, is this an issue? Twin 2.25 is 8sq inches, single 3 is 7sq inches (12% smaller), twin 2.5 is 10sq inches (25% bigger) and twin 3 is 14sq inches (75% bigger).

Thanks
Taylor
 

Not_An_Abba_Fan

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It works best because as the exhaust moves away from the engine it cools down taking up less space, so the smaller diameter rear section will aid flow.

This set up works on V6's better than V8's though.

Twin 3" will work if you have big primary 4-1's and at least a big cam or forced induction. Otherwise twin 2 1/2" will be fine.
 

Not_An_Abba_Fan

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IMO, on an LS1, yes.
 

m1lky

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Of those 4 which one would you choose and why?
 

Not_An_Abba_Fan

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Out of those 4, I wouldn't choose any. But if I absolutely had to, I would go the twin 3" as the others would be too restrictive once the revs got up.
 
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ive got a single 3" RAGE on my VX SS with 310rwkw and it sounds nice and deep no drone... but im gettting a twin 3" soon to see if that frees up a bit more power.
 
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