Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 414 Pontiac ACT's Xtreme pressure plates increase

ACT's Xtreme pressure plates increase clamp load by 50 to 120 percent

The UMI P/N 365002 kit includes Boxed lower control arms

highest performing street muffler we've ever built in a four inch case

50-inch tailpipes clear the factory spare tire and give you two choices of exit locations

Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 414 Pontiac ACT's Xtreme pressure plates increasePROFORM 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