The ARP Flywheel And Flexplate Bolts are an important part of your engine assembly and should be treated as such. ARP offers two styles of Flywheel/Flexplate bolts: The premium grade Pro Series has a 200,000 psi rating and the High Performance Series has a 180,000 psi rating. They are both forged from aerospace alloy and heat-treated prior to thread rolling and machining. Both feature an exclusive, flat, 12-point head design and larger than stock shank diameter for increased strength and improved flywheel register.
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