This flywheel bolt kit is specifically designed for the Toyota, Lotus 1ZZ-FE & 2ZZ-GE engines. The bolts are manufactured from 8740 chrome moly steel, heat-treated in-house to 200,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 1000% stronger than others and completely reusable.

• 200,000 psi rating
• Forged from aerospace alloy and heat-treated prior to thread rolling and machining.
• 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.