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Proform Wedge-Locking Header Bolts; Hex Head; M8 X .984In; Chevy LS; Nickel Plt; 12 Pcs 66754

66754
Engine Header Bolts | Wedge-Locking Technology | Hex Head Type | M8 Thread X .984 Inch Long | Shiny Nickel Plated | 12.9 Steel | 12 Pcs in kit | Fits GM LS Engines with 1/4in Wide Flange
Pricing: $31.95
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Description

Each PROFORM 12.9 Steel (equiv. Grade 8+) Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. It's an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.

Engine Header Bolts | Wedge-Locking Technology | Hex Head Type | M8 Thread X .984 Inch Long | Shiny Nickel Plated | 12.9 Steel | 12 Pcs in kit | Fits GM LS Engines with 1/4in Wide Flange

Details

  • 66754
  • 66754
  • 00037995667543
  • Proform
  • New

Shipping Information

  • Item Requires Shipping
  • 1.0 lbs.
  • W5.0000” x H7.0000” x L2.0000”

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