JCoop,
I made new side pipes with 2" primary tubes into a Hooker Headers 4 into 1 merge collector connected to a Howe racing muffler. The merge collector has a 3 1/2" outlet and the Howe muffler is 4" outside diameter with a 3 1/2" inlet and outlet. The Howe muffler is 3 1/2" straight through.
I picked up 59 RWHP and 50 RWTQ with these new pipes.
Here's a photo of the finished pipes.
