Flywheel bolts play and important role in the performance and safety of race cars and street machines alike. That's why the fastener experts at ARP have developed special bolts that are far superior to OEM hardware. ARP premium grade bolts feature an exclusive, flat 12-point head design and larger than stock shank diameter for increased strength and improved flywheel register. Complete with washers and nuts where applicable. Upgrade for ZF-86 manual Transmissions.