whenever you lose backpressure you lose some low end torque. 2k-4k is a little high, i got a prochamber and magnaflow and there was a noticable lose before before 2k, maybe it is just a psychological thing, sometimes i get in my car and i think something is broken, but its fine.
just my .02$
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97 GT--SOLD-- Magnaflow mufflers Mac Prochamber
K&N FIPK Steeda Tri Ax Nitto 555 King cobra clutch
98 Sonoma 2.2 DD
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