Flowmaster 2000125 Catalytic Converter Univ 200 Series: High-Flow Metal H.F. 2.50 Review

They work and sound good I can definitely feel the difference in acceleration as the Flowmaster 50 series sounds smooth

Looks like a great product. Delivery was very fast! Easy installation. I installed them on my 2000 Chevy K2500 with a 454. I can notice better throttle response and they make the truck sound great with true dual exhaust and short glazing. Definitely recommend this product. Flowmaster is always a good brand

I really like these Flowmaster High Flow cats, they have significantly increased gas mileage but I have two downsides. First, it keeps reporting my passenger side O2 sensor as bad but not the driver side. Second, my engine's temperature rose almost to the point of overheating. I cut them off after only 150 miles and weld them back to my standard crampons.

Beware if you buy something from this seller and it is damaged during the manufacturer warranty period you will dispute your case with the manufacturer instead of giving you a refund. Think about it: you need to go to a manufacturer who probably makes a lot of products and tell them you bought their product from so-and-so and it's stopped working and you want your money back. Do you think this will work? Stay away from this seller

Beware if you buy something from this seller and it is damaged during the manufacturer warranty period you will be fighting your case with the manufacturer instead of giving you a refund. Think about it: you need to contact a manufacturer, who probably makes a lot of products, and tell them that you bought their product from so-and-so and it no longer works and you want your money back. Do you think this will work? Stay away from this seller

I added 2 of these Flowmaster 2000125 cats to my 454 with some Flowmaster mufflers and H pipe and still love it, NO EXHAUST SMELL! The engine ran like a clog when it first started, but I've read that new cats have a break. Read online about idling at 2500 for 2 minutes so I just took them on a cruise. it slips more than 2.5 inches, it is overly stretched making it difficult to secure with a tie. Now it works great, no problem.

I'm sure it would be good for whatever you want to do but don't order this expecting your lights out! You either need a factory cat or cut out the damn converter and reconfigure the computer like I do on my 2004 Chevy 5.3. Run all new pipes from Cats through the 50 series with two in, two out with the twist from Down!. oh and xpipe. So much happier. Now all I have to do is set up the computer so my lights go out forever and then I got about 75 more horsepower because I swear it gave me about…