Bought a set of these last week and the quality of the header to testpipe gaskets is fantastic. They fit perfectly and look very well made! Unfortunately Z1 sent me the incorrect size gaskets for the testpipe to catback joint and I didn't find out until the car was up on a lift taken apart at the speed shop getting billed by the hour. The GTM testpipes came with very poor quality gaskets that unfortunately had to be used due to the error.
I emailed Z1 and they apologized for the error and are sending me new ones however the car is buttoned up and not planning on taking it apart again until the gaskets fail. I suppose when the time comes I will have a nice set rolling around my garage waiting to be swapped in.
Overall fantastic product and great customer service. I'd vouch for the quality of these gaskets for sure : )
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