3" or 2.5" exhaust

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Dec 24, 2001 | 08:03 PM

willyboyK20

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From: Miami, FL, USA

3" or 2.5" exhaust

This is for a drag gen II kit. I plan to boost around 8-9 psi. What would be the ideal size for that kit on a D16y8

Dec 24, 2001 | 08:07 PM

JM Performance

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Re: 3" or 2.5" exhaust (willyboyD16)

I'm always asking this too. I know bigger is better, but to what point? What I mean is: 3" is better than 2.5", but how much better? Enough to make it worth the extra cost and noise?

Dec 24, 2001 | 08:08 PM

degradated

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Re: 3" or 2.5" exhaust

If I'm not mistaken, 3" will always be the best choice for a turbocharged application. I guess if it were a really small turbo, 2.5" would be about as good, but turbos like to breath with minimal backpressure.