Sudden Posted June 29, 2016 Share Posted June 29, 2016 Usdm* distributorless ignition 5efe headgasket is 0.5-0.6mm metal. Specifically usdm, my JDM distributorless 5efe had 5efhe pistons and a normal sized non metallic head gasket. It isn't worth the effort with a 4efe. @Jeremiah Quote Link to post Share on other sites
StuDoc 72 Posted June 30, 2016 Share Posted June 30, 2016 Best way to get more from an N/A is to use NOS. Quote Link to post Share on other sites
Pikey009 Posted July 3, 2016 Share Posted July 3, 2016 Has anyone actually done it affectively? I know the kits are good on diesels Quote Link to post Share on other sites
StuDoc 72 Posted July 4, 2016 Share Posted July 4, 2016 MCM used it on an s2000 with great results if thats anything to go by. Quote Link to post Share on other sites
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