These Pro series flywheel bolt kits from ARP give you all that you need to bolt in your flywheel with confidence- Theyre much stronger than OEM hardware, are forged from aerospace alloy, and are heat-treated prior to thread rolling and machining- These bolts feature an exclusive, flat 12-point head design and a larger-than-stock shank diameter for increased strength and improved flywheel register-Features- Rear Main Seal Style - 1-piece- Fastener Finish - Black oxide- Fastener Material - Chromoly- Under-head Length UHL - 0-880 in-- Thread Size - 11 mm x 1-50- Wrenching - 12 in- SKU: KSAO719