Aftermarket Test Pipe crush ring?
 

So I’m planning on replacing my test pipe gaskets soon (header side). I saw something online from someone manufacturing aftermarket test pipes for our cars that said NOT to use a 3 bolt gasket and only to use the circular metal crush ring. I’ve seen pictures online that look like some aftermarket test pipes don’t have the flange for the crush ring to sit on… in which case only the 3 bolt gasket can be used.

What are people doing on aftermarket test pipes? Running both types of gaskets at once? One or the other?


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Ancient forum post suggests these GTM test pipes do have the flange for the crush washer. I’m hoping that feature is there when I pull the test pipes off my car. Seems like the 3 bolt gaskets aren’t super reliable on the test pipes to header connection.

https://www.myg37.com/forums/intake-...nd-10rwtq.html


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There's a good chance that your current test pipe wont have the donut crush gasket. Few aftermarket test pipes have revisions for it.

I've used 3 different test pipes with various 3 bolt gaskets and the best sealing ones were the ConceptZ thick gaskets.

you have a picture of what test pipes are on the car now?

Haven’t removed the TPs yet, but they are a resonated version of what is shown in the link above


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gotcha, here is the donut gasket you can use if it does have the lip as pictured

https://www.z1motorsports.com/gasket...t-p-15438.html