My 93 Bronco had a bad exhaust leak when i bought it, so i decided to install the summit shortys which turned out to be pacesetters but anyway, i didnt have any trouble on the driver side, but i broke two bolts off in the head on the pass side. I tried a bolt extractor and broke it off in the bolt and it was Matco brand that i use at work. So its looking like helicoil is my only option. Anybody had this problem, whats the size for the helicoil?? Thanks for any help.