I have been throwing the code P0420. I have already changed all the o2 sensors so i am going to change the converter and while i am at it i am going to change the muffler. I was wondering if there is a good cat back system that is reasonably priced that i can put on the blazer.

2001 2 dr 2wd blazer 4.3L

 

I guess no one as had to change their cat or muffler.

 

Sure, lots of us have and it's been discussed plenty of times. Browse the threads in this 'Header, Intake, & Exhaust' section.