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, 1" long) with a black oxide finish, and pre-assembled Wedge-Locking Washers.
Additional Attributes:
GTIN: 00037995667567
Applications: Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413
Color: Black Oxide
Diameter: 3/8-in.
Feature/Benefit: Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations.
Finish: Black Oxide
Length: 1 inch
Material: Steel
Part Type: Header Bolts
Extended Information:
Emissions : CARB Eligible
Life Cycle Status: Available To Order
Packaging:
Quantity of Each: 1
Package UOM: EA
Dimension: 6.75 x 4.5 x 1.75 inches
Weight: 1.25 PG
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