GM Performance Locking Fasteners

Welcome to the GM locking fasteners section of the Stage 8 website. Each kit is manufacturer specific using USA or metric bolt sizes.

All Stage 8 Locking Fasteners are engineered to keep critical bolted joints tight in the severest operating conditions. Guaranteed. Stage 8 Locking Fasteners are also available in custom sizes and material by special order.

Click the section option that fits your needs best; for GM we have header bolts, collector bolts, harmonic balancer bolts, oil pan bolts, valve cover bolts, starter motor bolts, intake manifold bolts and other fastener kits.

The Stage 8 Sales and Tech departments are also available to assist with your order.

  • Bolts Are Aircraft Quality Grade 8– 4130 Alloy Steel
  • Bolts Plated With A Duplex Nickel Finish
  • Retainers are 5052-H32 Polished Aluminum
  • Snap Rings & Clips Are Spring Steel
  • Clips Are Plated With Duplex Nickel Finish

Stage 8 Locking Fasteners install easily and are available in U.S. and Metric sizes. The bolts are application specific as either hex head with a 3/16 recessed Allen head or 12 point.