PROFORM Wedge Locking Header Bolts .984" Long Set For LS Engines With 1/4" Flange



  • Set of Twelve
  • Grade 8 Hardware
  • Wedge Locking Design
  • For LS Engines

Set of PROFORM .984" Long Wedge Locking Header Bolts for LS Engines with a 1/4" Flange.

Keep your exhaust headers securely in place with a set of .984" Long Wedge Locking Header Bolts (66754) from PROFORM. Permanently assembled with a unique pair of washers, the Bolts will resist any bolt-loosening rotation. The set consists of twelve grade-8 bolts for your LS Engine with a 1/4" Flange.

Features and Benefits:
- Grade 8 Bolts
- .984 Inches Long
- Fits LS Engines with a 1/4-inch Flange
- Set of Twelve 

How exactly does the Wedge-Locking design function? When the bolt is torqued to 28+ ft-lbs, the washer's super-hardened external teeth bite into and clench the bottom of the bolt head and the top surface of the header. Each washer's interfacing, matching cams create a wedge-locking action so the bolts won't come loose. 

Since the wedge-locking strategy uses tension instead of friction, exposure to oil promotes the wedge effect. When it's time to change headers, simply loosen the bolts with a wrench, lubricate them and reuse them. 

California Residents: Proposition 65 Warning

Vehicle Fitment

This product will fit the following C10 years:

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