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Presto · 03-23-2015, 01:42 AM

i have used both motordyne art pipes and the FI double resonated test pipes in my car both paired with the FI exhaust with 18" resonators.
I can tell you that the butt dyno does not detect any increase/decrease in torque for motordyne vs FI. Yes there is a noticeable loss of torque at the lower rpm compared to the stock catalytic converters.

Im currently running the FI double resonated test pipes simply because they sound better. performance wise i could not detect any difference between the two.

03-23-2015, 01:42 AM	#3 (permalink)
Presto Base Member Join Date: May 2010 Location: Home Posts: 123 Drives: Car Rep Power: 15	i have used both motordyne art pipes and the FI double resonated test pipes in my car both paired with the FI exhaust with 18" resonators. I can tell you that the butt dyno does not detect any increase/decrease in torque for motordyne vs FI. Yes there is a noticeable loss of torque at the lower rpm compared to the stock catalytic converters. Im currently running the FI double resonated test pipes simply because they sound better. performance wise i could not detect any difference between the two.