I don't want to spend a bundle on exhaust, so any suggestions on a simple muffler swap? I don't want the bumble bee sound or red neck loud. I've seen some high flow cats on Ebay, would that change the sound much?

 

That OBX system on eBay is not bad. I heard one on an ATX 3.0 Max, the intake was actually louder than the exhaust.

 

A high flow cat wont change the sound much at all... but if you put in a test pipe aka straight pipe it will definitely help bring out the bees.

 

CM Headers --> CM-b ---> stock rear piece =