I'm not positive but I think 500 RWHP will be difficult with a 2.5" and if it is possible you'll probably still suffer at lower rpms a lot more and have a longer spool up time.
Greddy has a 2.75"
AAM has a 3"
GTM has a 3"
As more turbo kits hit the market we'll likely see more 3" exhausts hit the market.
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This will decimate all after you put about fifteen grand in it or more, and if we have to, overnight parts from Japan.
Joe Clem and Koeppel Nissan
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