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 sixteen 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.
Fits Gm Bb 396-502 Exc 348 And 409, Ford 5.0l, Sb 289-302-351w, Mopar 413
Part Type
Header Bolts
Material
Steel
Finish
Black Oxide
Packaging
package quantity
1
length
6.75 in
width
4.50 in
height
1.75 in
weight
1.00 lb
Information on technical characteristics, the delivery set, the country of manufacture and the appearance
of the goods is for reference only and is based on the latest information available at the time of publication.