PRP Race Series Cam Ignition Timing Kit - Toyota 1JZ/2JZWhat separates this kit from other kits on the market? Our kit provides a superior level of accuracy, fitment and engine protection as it is machined in house to the most stringent of tolerances, our crank gear and crank wheel is machined with very modern machining processes and in a world first format out of a one piece billet, into a monoblock assembly which ensures zero failure points with extremely accurate ignition timing and mechanical timing