I have this model in my 2010 4x4. It's designed for a FWD though, and works pretty well. Magnaflow Jeep Patriot Stainless Steel Single Cat-Back Exhaust System - AutoTruckToys.com

 

I have a 50 series delta flow on my 2.4L Patriot, it sounds good, cost under 100.00 and has ZERO interior drone.

https://youtu.be/5ZsVDL_R0JQ

 

That's just the muffler, what I bought includes stainless steel pipe to run most of the vehicle's length.

 

Magnaflow has good reviews, should be a good choice for cat-back system.