trd, LCENGINEERING, DOWNEY OFF-ROAD make it yourself.. thats about it.. there is some cheap stuff on ebay, LC is bout the best stuff u'll find, downey makes motors and kits and has every part for off-roadin and drive train. but LC is just about purely performance stuff. they build complete long blocks and short blocks and just do-it-yourself kits. they also have the best turbo system for the 22RE's.. if u'r into that sort of stuff..
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www.downeyoff-road.com---> www.lcengineering.com---> www.trdusa.com