This ARP 200-2902 Flexplate Bolt Kit fits 90-degree V6 & 265-454 V8 Chevy with the 2-piece rear seal and also 289-460 V8 Ford engines. ARP's premium grade Pro Series has a 190,000 PSI rating and the High-Performance Series is rated at 180,000 PSI. Formed from aerospace alloy and heat-treated prior to thread rolling and machining, they are far superior to OEM hardware. Both feature an exclusive, flat, 12-point head design and larger than stock shank diameter for increased strength and improved flywheel register. ARP 200-2902 Flexplate Bolt Kit Features: Fits 90-degree V6 & 265-454 V8 Chevy engines with a 2-piece rear seal Also fits 289-460 V8 Ford engines 190,000 PSI 0.680 UHL 7/16-20 thread Flywheel and Flexplate bolts play an important role in the performance and safety of race cars and street machines alike. Protect yourself and your ride with ARP!