PROFORM Wedge-Locking Header Bolts ELIMINATE the need to constantly re-tighten collector bolts, and without the need for clips, pins, racing-wire, chemicals or gunk. The secret is in the Wedge-Locking Washer's super-hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge-locking action that uses tension, instead of friction to stay snug. In fact, contact with oil actually facilitates the effect. Installs/uninstalls with a normal wrench, lubricate, and then reuse. Each set comes with twelve Hex Head, Grade 8 (12.9) steel bolts (3/8"-16 thread, 3/4" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.
Specifications:
| Description_ABR |
Header Bolts |
| Description_ASC |
Wedge-Locking Header Bolts; Hex Head; 3/8 dia. X 3/4in Black Oxide; 12 Pcs |
| Description_DEF |
Exhaust Header Bolt |
| Description_DES |
Wedge-Locking Header Bolts; Hex Head; 3/8 dia. X 3/4in Black Oxide; 12 Pcs |
| Description_INV |
Header Bolts; Hex Head; 3/8-16 X 3/4L |
| Description_EXT |
Engine Header Bolts; Wedge-Locking Technology; Hex Head Type; 3/8-16 Thread X 3/4 Inch Long; Black Oxide Finish; 12 Pcs in kit; Fits GM V6, SB 265-400, Buick, Olds, Pontiac '79 and earlier, Mopar BB 383-440 exc 413, AMC V8's w 3/8" bolts |
| Description_SHO |
Header Bolts-Black |
| Description_MKT |
PROFORM Wedge-Locking Header Bolts ELIMINATE the need to constantly re-tighten collector bolts, and without the need for clips, pins, racing-wire, chemicals or gunk. The secret is in the Wedge-Locking Washer's super-hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge-locking action that uses tension, instead of friction to stay snug. In fact, contact with oil actually facilitates the effect. Installs/uninstalls with a normal wrench, lubricate, and then reuse. Each set comes with twelve Hex Head, Grade 8 (12.9) steel bolts (3/8"-16 thread, 3/4" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers. |
| Description_LAB |
Wedge-Locking Header Bolts; Hex Head; 3/8 dia. X 3/4in Black Oxide; 12 Pcs |
| Finish |
Black Oxide |
| Diameter |
3/8-in. |
| Applications |
Fits GM V6, SB 265-400, Buick, Olds, Pontiac 79 and earlier, Mopar BB 383-440 exc 413, AMC V8's w 3/8in bolts |
| Material |
Steel |
| Length |
3/4 inch |
| Feature/Benefit |
Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations. |
| Color |
Black Oxide |
| Category |
Header Bolts |
| Part Type |
Header Bolts |
| Length |
2.0000 |
| Width |
5.0000 |
| Height |
7.0000 |
| Weight |
1.0000 |
