ARP Crank Pulley Bolt Kit - B58

Product Details

In high-performance BMW B58 engines, the factory crank pulley bolt is a critical weak point. Under increased boost, aggressive launch control, and sustained high-RPM track use, the stock torque-to-yield (TTY) fastener is prone to stretching, backing out, or failing entirely—often resulting in catastrophic engine timing failure.

The ARP Crank Pulley Bolt Kit is a premium, race-grade upgrade designed to eliminate harmonic balancer spin and secure your engine’s bottom end. Manufactured from ARP’s proprietary ARP2000® alloy, this kit provides the ultimate clamping force required for high-horsepower builds.

Key Features & Benefits:

• Premium ARP2000® Construction: Rated at an ultra-high tensile strength of 220,000 psi, vastly outperforming OEM fasteners and ensuring zero stretch under extreme load.

• Reusable Design: Unlike the factory torque-to-yield (TTY) bolts which must be discarded after a single use, this ARP kit is fully reusable, making future engine servicing simpler and more cost-effective.

• Precision Manufacturing: Feature-ground parallel washers and cold-rolled threads after heat treatment for optimum fatigue life and uniform load distribution.

• Corrosion Resistance: Finished in a durable black oxide coating to withstand harsh track environments and prevent galling.

Prop 65 Warning

Product Q&A

Lifetime Replacement

Fits These Cars