I run 2.25", Downey Header, Car Sound Free Flowing Cat, and a Straight Tube Style Magnaflow muffler.

If I had to do it again I might go back to 2"...Just for more compression braking and the fact that it seems to run rich all the time no matter how I tune it.

Runs great though...I have not much low end like Yodta said..But when I hit about 3200 RPM it comes to life up to 6000rpm.

Gears helped my low RPM issue and brought me back to be able to have low end...That's an expensive mod just to compensate for an exhaust that was punched out too big though.

The Magnaflow is about 3-4yrs old and is getting pretty loud now. They don't like that up north in New England...Nobody in Virginia ever bothered me with it though.