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![66824 Wedge-Locking Header Bolts for Small Block Chevy, Big Block Mopar, AMC, Buick, Olds, & Pontiac [3/8 in. x 1 in. Long]](https://www.jegs.com/images/mini_750/700/778/778-66824.jpg)
Vehicle Info NeededPROFORMPART NUMBER: 778-66824
66824 Wedge-Locking Header Bolts for Small Block Chevy, Big Block Mopar, AMC, Buick, Olds, & Pontiac [3/8 in. x 1 in. Long]
$3495
3 left in stock
Ships on Sep 14, 2026
Lowest Price GuaranteeWedge-Locking Header Bolts
Wedge-Locking Header BoltsGM V6 Small Block Chevy 265-400 1979 & Earlier Buick, Oldsmobile, & Pontiac Big Block Mopar 383-440 AMC V8 3/8 in.-16 Thread Diameter x 1 in. Long Nickel Plated Finish Hex Head Grade 8 Steel Set of
Proform 66824 Wedge-Locking Header Bolts for Small Block Chevy, Big Block Mopar, AMC, Buick, Oldsmobile, & Pontiac Features:
- Special washers have super-hardened external teeth that grip the bolt head and header surface when torqued to 28+ ft-lbs
- Self-locked configuration prevents bolt-loosening rotation through a wedge-locking action created by matching cams on the washers
- Vibration increases wedge-locking tension, enhancing the bolt's security
- Simple wedge-locking method relies on tension, allowing oil contact to facilitate the wedge effect
- PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused during header changes
Part TypeHeader Bolt
BrandPROFORM
Package Height1.75
Package Width4.5
Package Length6.6
Weight0.65 PG
Part CategoryReplacement Parts
Part FitmentSemi Universal
Vendor Part Number66824
Package Qty1
Package TypeEA
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