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Discussion Starter · #1 ·
Hello, newbie here with 07 GTi. So far I have the GIAC X plus chip and EVO intake installed. I'm now considering a downpipe and exhaust package to maximize power gain.

Where I live, in Taiwan, GIAC deales carry and recommend AWE exhausts (2.5"), but my North American friends suggests GIAC with APR (3").

I would like to know if GIAC is only programmed to work with AWE 2.5" exhaust Or would GIAC's program work ok with a 3" APR exhaust?

Any inputs would be appreciated.
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