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

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.