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Premium Member
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197 Posts
Discussion Starter #1
I've recently had a custom stainless exhaust made, I have 2.25 cat back to just running one rear box at the rear , keeping it dual exit again 2.25 inch.

Is this diameter ok for say me running around 220 BHP, reckon with the mods I have this is approx my running figure.

Been looking at other systems for the fn, and there slightly bigger ? Not a lot but bigger, am I ok running 2.25 or should it be bigger ? Like 2.5 at least ?

Thanks in advance
 

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250bhp.... finally :)
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4,279 Posts
Bigger is usually better but for 220bhp I can't see it being an issue.

I made that with 2.5" but had a cat too
 

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Premium Member
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886 Posts
Its fine. Oem exhaust will support 250 bhp albeit hold back rate your car goes revs but thats a whole other topic.

Im confident oem exhaust would run 255bhp maybe even few bhp more but never got to that stage of testing
 
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