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      02-24-2013, 09:05 AM   #3
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Gearhead999s's Avatar
Drives: E93 335is(wifes)E92 M3
Join Date: Apr 2007
Location: Toronto

Posts: 6,696
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Supertrapps are real bad for power but depending on the disc setup can do a good job of quieting things down.We used them over 20 years ago on our racecar & went to Flowmasters to meet the noise regs.I am suprised that Supertrapps are still used.
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