Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413 1982-ford-f-150 Occasional grinding may be required

Occasional grinding may be required due to GM G-Body product tolerances

the SB044 is cold formed to better resist torsional fatigue and retain its "memory" far longer than the hot-formed bars used by many competitors

We are especially proud to introduce our own ultra-premium springs built from CrSi wire and featuring 530 lb/in front and 130 lb/in linear rates

They are available in diameters that support O

500” USA-made DOM steel tubing

Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413 1982-ford-f-150 Occasional grinding may be requiredPROFORM 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