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qoncept · 07-10-2013, 03:03 PM

I don't know what gains you'd see but you don't ever want to decrease exhaust diameter after the collector (or turbo). Ideally the diameter gets bigger.

07-10-2013, 03:03 PM	#2
qoncept Senior Member Join Date: May 2013 Drives: 2013 BRZ Location: Iowa Posts: 928 Thanks: 135 Thanked 298 Times in 202 Posts Mentioned: 1 Post(s)	I don't know what gains you'd see but you don't ever want to decrease exhaust diameter after the collector (or turbo). Ideally the diameter gets bigger. __________________ CSR BRZ Log