Aug 1st 22: My Texas Speed & Performance stainless steel Y-pipe came with chrome plated crampons and after the 2nd winter it was clear that they had to be attached to my expensive stainless steel hooker manifolds and steel Y would start to rust. This When I got a pair of these again👍 and win a pair of MagnaFlow 3″ stainless steel 👎Flowmaster units by a wide margin, I doubt another brand doesn't even corrode as promised, look very cheap and cost $20 more each. I drove about 50 km. so far, and the sound of my LS1 is clear and very harsh with a slight kickback when downshifting in the 3000rpm range or higher and during deceleration cats and durability remains to be proven. MOST HIGH FLOW CONVERTERS REQUIRE SOME O2/CAT PCM ADJUSTMENT OR DEACTIVATION with EFI Live, HP Tuners etc to ensure your fuel maps are correct after changing the cat - IT'S SO GOOD! With these shrink-wrapped and o2 code setups my 20 year old SLP SS is running smoother than butter again👌Original: I got a pair of these in two standard boxes with the Flowmaster logo and part number on them. They appeared high quality and very well made, with the company logo engraved on the outside. The 200 cell honeycomb catalytic converter was attached to the inner shell of the blocks at 3 points on each end. My current cats don't even take 18 months so I knew I might as well not use them. The PCV valve leak that was causing the incorrect "Catalyst Under Threshold" SES was fixed and I got those unused 5 stars back for quality construction!