Gary, with the silences in and the factory down pipe, ,at the drag strip I ran stock a 15.193 at 89.94 mph, removed the white silences and ran a 15.085 at91.02 mph. then I installed the amx intake down pipe, and ran 14.85 at 93.31 then added boost set at 18, with amx's tip mod and ran a 14.65 at 94.48 the first run was around 6:30 pm temp 78 the last run was around 9;00 pm temp was around 65, went back to the track the next week and ran 14.719 at 93.45 mph temp was 80*
so to answer your question, yes it helps to remove what ever you can.
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