Flywheel bolt. Porsche 911 / 924S / 944 / 964 / 968  ❭  93010220601

Flywheel socket head bolt. 
Built to factory spec for 911, 924S, 944, 964, and 968. It used for secure clamping of the flywheel to the crankshaft, maintaining precise alignment and long-term reliability.
Sold each, 9 required per vehicle.

Fits:
Porsche 911 1978-89
Porsche 924S 1986-88
Porsche 944 1982-91
Porsche 964 1989-94 (not RS)
Porsche 968 1992-95

Diagram ref no 6.

Provides the critical clamping force between crankshaft flange and flywheel. Correct bolt stretch and friction are essential to prevent loosening, fretting, or flywheel run-out that can cause vibration, starter engagement issues, or clutch damage.

Over time, flywheel bolts can stretch, corrode, or lose their clamping strength due to repeated torque cycles and heat exposure. A weakened or reused bolt may fail to maintain the necessary preload, risking vibration, misalignment, or flywheel damage.

Replace the flywheel bolts when:
• Performing a clutch or flywheel replacement (most Porsche bolts are single-use torque-to-yield).
• Bolts show signs of corrosion, thread damage, or head wear.
• The factory service procedure specifies new bolts for reassembly.

Installing a new bolt set ensures secure fastening, correct torque tension, and long-term drivetrain reliability.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93010220601

The product you are viewing cross references to these numbers