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I am going to be getting rid of the TPIS exhaust on my '89, and will be using the opportunity to also install a new front y-pipe with the integral catalytic converters (I may be moving to California). Does anyone know if there is a gasket at the joint between the y-pipe and where it attaches to the exhaust manifold? If there is, what is the size?
When you say TPIS exhaust what do you mean? TPIS headers?? Front Y-pipe with no cats??
Why are you taking it off?
It's the TPIS catback exhaust system. The problem is simply that it is poorly designed and made, and I have decided to replace it and take care of the converters at the same time.