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Old 12-30-2012, 03:53 PM   #345
Scooby Specialist
Member#: 274001
Join Date: Feb 2011
Chapter/Region: MWSOC
Location: Detroit/Kalamazoo, Michigan
98 Impreza RSTi
Rally Blue Pearl


Was on late last night and was tired so didn't give much of a reason why hah.

Basically i'd go catless because you'll have lower EGTs, less backpressure and less weight (albeit like 8 lbs, but whatever.. it all ads up). Because of this you will be able to spool quicker (more flow = faster spool), and eventually be able to tune better (lower EGTs and such).

I've heard people say that a bigger downpipe (like 3in up from 2.5in) will cause an increase in boost, but that literally makes no sense to me as a stock wastegate is pressure controlled by the spring anyways.

To sum it up: from the turbo back, bigger and less impedance is better
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equinox92 is offline   Reply With Quote