66751 - PROFORM Wedge-Locking Header Bolts 3/8"-16 Thread Diameter - 3/4" Long (Set of 12)

PROFORM Wedge-Locking Header Bolts 3/8"-16 Thread Diameter - 3/4" Long (Set of 12)

PROFORM Grade 8 (12.9 steel) header bolts are designed to keep bolts from backing off. 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 black oxide finish.

Applications:

• GM Chevy V6 Engines
• GM Chevy Small-Block V8 Engines
• Buick, Oldsmobile, Pontiac V8 Engines
• Chrysler B/RB Engines (exc 413)
• AMC V8 Engines with 3/8" Bolts

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

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

• 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.