66755 - PROFORM Wedge-Locking Header Bolts M8 Thread Diameter - 1.181" Long (Set of 12)

PROFORM Wedge-Locking Header Bolts M8 Thread Diameter - 1.181" Long (Set of 12)

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These permanently assembled bolts feature special washers with super-hardened serrated teeth that, when sufficiently torqued, the washers bite into and grab 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. Engine vibration increases the tension, making them even more secure! They are re-useable and you can count on them to not fail. Sold as one complete set of 12 pieces with nickle finish.

Applications:

• GM LS Engines with 3/8" Flange

Use part# 66757 For Wedge-Locking Collector Bolts and Nut Set. Sold separately.

Product Specifications
Shipping Dimensions

• Weight: 1 Lb
• Dimensions: 7" x 5" x 2"
• Freight Type: Standard

Emissions Compliance

• Non-Emissions: This product does not require an EO in California. By nature of its design, it is legal for sale and use in all 50 states. Replacement parts included.