PROFORM Header Bolts Grade 8 Wedge Locking 3/4" GM V6/ SBC 265-400
Highlights
- Direct Fit Upgrade
- Locking Bolt Design
- Complete Set
- Grade Eight Durability
PROFORM Grade 8 Wedge Locking 3/4" Long Header Bolts for GM V6 and 265 to 400 Cubic Inch SBC.
Installing new headers on your small block Chevrolet or V6 engine? These high-quality PROFORM header bolts (66751) are the perfect addition! Their locking design will securely hold them in place when installed.
Features and Benefits:
- 3/8”-16 thread diameter
- ¾ inch long
- fits GM V6 and 265-400 small block
- set of 12
Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washer's 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. Because this simple wedge-locking method uses tension instead of friction, contact with oil facilitates the wedge effect.
When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.
California Residents: Proposition 65 Warning
Related Categories: Chevrolet C10 Parts, C10 Restomod, C10 Exhaust, C10 Exhaust Hardware, C10 Restomod Exhaust
