ktm Posted September 29, 2011 Share Posted September 29, 2011 They'll burn through in under 150 miles. I, like many others here (after a quick search), developed two large exhaust leaks at each header collector gasket. The JTR headers have a floating flange that does not lie flush with the flange on the exhaust pipes. The flange floats on the sealing "ring" of the headers. This ring provides around an 1/8-in. sealing surface which is not enough. I burned through my gaskets in under 150 miles. Save yourself some grief and install either dead soft aluminum or copper collector gaskets. Quote Link to comment Share on other sites More sharing options...
kj280z Posted September 29, 2011 Share Posted September 29, 2011 I've installed the aluminum ones and they work great, no leaks and over 2,500 miles Quote Link to comment Share on other sites More sharing options...
EvilC Posted September 29, 2011 Share Posted September 29, 2011 Well, I have used the dead soft AL gaskets for over 10,000 miles on the swap. The paper gasket also do last but if your car runs hot or is running near lean, you will pop those gaskets in 150 miles....ask me how I know? (Joe will chime in on how I almost runined his engine blah blah blah..... ) Quote Link to comment Share on other sites More sharing options...
Bigdeezs Posted September 30, 2011 Share Posted September 30, 2011 yup runnin Percy's 66002 3'' Collector Gaskets for about 15k here...no problems and have had the same set on and off probably 4-5 times. Quote Link to comment Share on other sites More sharing options...
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