1993 5.0L build aka: Frankenmiata
#26
V8 Miata Participant
Thread Starter
I have the Percy gaskets, the header to head flange is not the issue, it is the angle of the exhaust to header lower flange angle that is slightly different. Not a big deal, should not take more than an hour a side to cut and reweld.
Bill S.
#27
V8 Miata Zealot
It is actually the collector gaskets that I am having the issue with.
#28
V8 Miata Participant
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Bill S.
#29
Administrator
I use the Percy ones and a bunch of red, sensor safe silicone on the head side and a good felpro and silicone on the collector end. I had very bad luck using the Percy gaskets on the collector. They simply deformed and leaked after about a week.
Before switching over to this procedure I had to redo the header gaskets every year. I haven't touched these since I wrapped my headers 3 years and 15K miles ago.
-Jason
#30
V8 Miata Fan
Just in case anyone is interested to learn the fate of this Monster, I bought it from Bill in February and drove it from PA to Florida where it spends most of its time in my garage. I drive it a few times a week. What a blast!
#31
V8 Miata Participant
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