[batman5986]

Anyone that modified their mufflers notice a loss of torque? I replaced one of my mufflers with a Flowmaster, there seems to be some loss of torque. I noticed it because the wheels will no longer spin out no matter how hard I try.

 

[blkbute]

this occurs because there is less backpressure. You need some back pressure on the lower end, but you will have more power on the higher end.