Quote:
Originally Posted by RCZ
Hmm, 3" was recommended for bigger turbo setups on the STI (2.5l F4). Much smaller engine, granted target boost was 23psi for me then, but I would imagine the 3.7TT flows a lot more than the 2.5T did. Freer is better for FI apps. .02
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Single piping vs dual maybe?? Dual 2.5 would be 5 inches of total piping.