I am thinking about putting a high flow muffler on my Screw. Want something quiet but that will flow better than stock. I need Torque, so I am thinking about keeping the stock pipes and just replacing the muffler. Has anyone done this and what were the results?

 

Ton and tons of posts on this. Gibson Swept Side gets my vote. Also look at Magnaflow. Mike Troyer in Computer CHips can tolk to you about that one.

Search (the boards) and ye shall be consumed with more exhaust than you ever wanted!

 

I installed a spintech stainless muffler only, I've been real happy with the performance sound and cost. I have 3:08's and didn't notice any loss of bottom end, in fact feels a little better, pulls harder.