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Old 02-19-2010, 04:54 PM   #47
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Join Date: Aug 2008
Location: Seattle
Posts: 213
My Ride: e30
Originally Posted by IrocThe325i View Post
Flow = top end power. Back pressure = low end toqrue... usually.
Explain to me how backpressure helps low end torque?

If you were to say that smaller exhaust pipes create more low end torque but also result in less power at high rpms due to increased backpressure, I would buy that.
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