Flywheel Bolt Kit by ARP These Pro series flywheel bolts from ARP give you all that you need to bolt in your flywheel with confidence. They\’re 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 Thread Size: M12 x 1.25 Underhead Length (in.): 1.180 in. Washer Included: No Head Style: 12-point Fastener Finish: Black oxide Fastener Material: Chromoly Benefits Much stronger than OEM hardware Forged from aerospace alloy Heat-treated prior to thread rolling and machining Applications Nissan Skyline GT-R BNR32 Nissan Skyline GT-R BCNR33 Nissan Skyline GT-R Autech Version 40th Anniversary BCNR33 (Autech factory-installed RB26DETT and AWD 5spd transmission in R33 sedan chassis) Nissan Skyline GT-R BNR34 Nissan Stagea 260RS WGNC34 (RS4 Chassis used) Tommy kaira ZZII (concept car) What\’s In The Box? 6- Bolts Warranty Manufacturers Standard Warranty