Proform Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 414 66825 1981-gmc-k1500-esi9569435 100% TIG-Welded for Strength and

100% TIG-Welded for Strength and Durability

5210 1401AB

CORSA Performance APEX intake systems install quickly (most under 30 minutes) and come complete with step by step installation instructions

EZ Mount packages the manifold and upgraded

Heavy duty control arms provides on car adjustability of camber alignment

Proform Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 414 66825 1981-gmc-k1500-esi9569435 100% TIG-Welded for Strength andPROFORM 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