We build a new exhaust setup for the 235 (typical dual Offy/holley-weber/split exhaust/m4F/ .06 over).

The pipes are 2 1/4 inch diameter with 2 flowmasters just before the rearend.

I was kind of disapointed when I drove it the first time. It feels like it lost all of the low end torque. frown

Is it possible to loose so much torque just by installling bigger diameter pipes? I thought that the lower backpressure the better it is.

Thanks, Frank