Review on Walker 31374 Exhaust Gasket by Tyrazz Abouzar

Replaced cat to back exhaust gaskets on both sides of my 2002 Lexus LS430 with P0420. These gaskets fit perfectly and fixed my exhaust leak that was causing the P0420 check engine light for the catalytic converters. It is worth noting that my P0420 was not accompanied by any other codes. If you have other codes, resolve those issues before troubleshooting P0420. This recommendation applies to all vehicle makes/models with a P0420 code. The previous owner tried unsuccessfully to patch the leak with one of these putties to "fix" the exhaust leak. Since changing pads takes 15-20 minutes per side, it's hard to imagine that gupas could be cheaper or easier to apply and still get a decent solution to the problem. All in all, these seals are worth trying if you have a P0420 CEL.