Quote Originally Posted by bobo_d_wiseman
o yea, ano po ang free-flow mufflers? yun ba yung papaputol yung muffler at palitan lang ng 2inch diameter na pipe? may benefit ba pag paputol yung pipe hangang gitna? (mga 3inches after the resonator?) thanks ulit!
a freeflow muffler still looks like a muffler externally but the design you can look thru it if you look at it from one of the open ends.

Cutting your exhaust pipe after the resonator will just result in a noisy car and loss of backpressure which might result in less lower rpm torque.