Your Cart Is Empty

GMC Sierra Catalytic Converters

Have a Question?
Have a Question? Ask a product expert! (800) 874-8888 Live Chat

  • shipping icon
  • Not Rated Yet


View all reviews for this product

There are no customer reviews for this product

You may only compare up to 5 products at a time.
Please select at least two products to start comparing.

Latest Customer Reviews

Magnaflow Catalytic Converters - 49 State Legal Reviews


Reviewed By Paul V (Green Bay, WI) Reviewed for a 2003 GMC Sierra —6/4/2015 6:02 AM

I bought the: Magnaflow Catalytic Converters - 49 State Legal Universal Fit Part #: 99209HM Had them installed for $150. They replaced the original ones on the truck with a stock exhaust (6.0 GMC). They seem to make the exhaust sound a little deeper in tone, which I like.

View More Reviews

Magnaflow Catalytic Converters - 50 State California Legal Reviews

AutoAnything cam through again....

Reviewed By Robert O (Apple Valley, CA) Reviewed for a 2014 GMC Sierra —12/14/2013 1:38 AM

Not only did AutoAnything deliver in less than 24 hours, but the price with the Black Friday discount and free delivery blew everyone else out of the water... Had the cat installed on a Monday and my truck passed it's Smog test with flying colors.. Not bad for a 20 year old Yukon 2 door, 4x4... Thank you AutoAnything...

View More Reviews

Eastern Catalytic Direct-fit Catalytic Converters - 49-State Legal Reviews

Outstanding Value and Performance

Reviewed By Edward Z (Mays Landing, NJ) Reviewed for a 2004 GMC Sierra —8/11/2011 8:44 PM

This converter was a drop-in installation. Once I acquired a deep socket and a socket wrench entension, the installation was a breeze. Total installation time was less than 1 hour for this disabled shade tree mechanic. The hardest part was the removal of the O2 sensor. After driving for almost 2 weeks, I have seen a marked improvement in mileage. Granted I purchased this car used, the EPA highway estimate was 26 mpg, but on a recent trip, I ran over 32 mpg consistently! For a 10 year old car, I will NOT sneeze at this economy!

View More Reviews