Does anybody know the part # for the correct donut gasket for a 4-1 header w/ 2.5 collector and 2.5 cat back exhaust? I bought one for a 94 ls teg it snugs in the header collector perfect but on the test pipe which i did custom 2.5 at a muffler shop it doesn't snug in to good and now it's leaking and i can here it every time i get up on it throughout the gears. does anybody here know what part # i can use without it leaking at all? i don't remember the part # for the one it got but it's for all 94+ tegs but inner dia. needs to be 2.5. Thanks for your help guys.

 

First, the gasket is meant to fit around the outside of the collector, not inside. You need a 2.5" ID gasket, and you have a few choices. You can contact SMSP and have him send you one (probably the least expensive route), or you can buy an OEM gasket from either Honda or Acura.

Honda: 18299 PCX 003 - S2000 gasket

Acura: 18229 SPO J51 - Legend gasket

 

so either one will work? i'll just go to honda and get the cheapest one. what yr model on both cars?

 

I'm not sure about the Legend model years, but any year S2000 will work.