Proform 66826 12 Pcs for Select Chevrolet C1500, Chevrolet C1500 Suburban, Chevrolet C2500, Chevrolet C2500 Suburban, Chevrolet C35, Chevrolet C3500, Chevrolet Camaro, Chevrolet Cargo Van, Chevrolet Corvette, Chevrolet Express 1500, Chevrolet Express
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Each PROFORM Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. Its an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.
12 Pcs in kit
Fits: 1997-1999 Chevrolet C1500, 1997-1999 Chevrolet C1500 Suburban, 1997-1999 Chevrolet C2500, 1997-1999 Chevrolet C2500 Suburban, 1997-1999 Chevrolet C35, 1997-1999 Chevrolet C3500, 1997-1999 Chevrolet Camaro, 1997-1999 Chevrolet Cargo Van, 1997-1999 Chevrolet Corvette, 1997-1999 Chevrolet Express 1500, 1997-1999 Chevrolet Express 2500, 1997-1999 Chevrolet Express 3500, 1997-1999 Chevrolet K1500, 1997-1999 Chevrolet K1500 Suburban, 1997-1999 Chevrolet K2500, 1997-1999 Chevrolet K2500 Suburban, 1997-1999 Chevrolet K3500, 1999 Chevrolet L30, 1997-1999 Chevrolet P30, 1997-1999 Chevrolet Silverado, 1999 Chevrolet Silverado 1500, 1999 Chevrolet Silverado 2500, 1997-1999 Chevrolet Suburban 1500, 1997-1999 Chevrolet Tahoe, 1997-1999 Chevrolet W3500 Tiltmaster, 1997-1999 Chevrolet W4500 Tiltmaster
Please review Specifications and the detailed fitment table for notes and exceptions.