NEW Muse Motorsports External O2 Dump!
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From: Hudson, MA
No sir. Our testing showed no gains going from 2.5 to 3" and most 3" downpipes are 2.5" at the flange 
If the turbine outlets on these cars were 3", there would be some better gains.

If the turbine outlets on these cars were 3", there would be some better gains.


