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bottom line is this from someone who has used 100 octane in 15 cars both with and without ecu tunes and ranging from 67 corvettes to R 8 to...
you can reduce the drone a bit at low rpm by either putting a resonating test pipe in in place of the straight test pipe if you by passed the...
do you have any folding or plastic sleeve 1990 Testarossa key blanks????
The xpipe does do something,, xpipes add or prevent loss of some low end torque when you do a open exhaust system and also equal out pressure...
