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This combination of manufacturing processes and materials results in a stronger pushrod giving you a quality component that helps to maximize valvetrain performance
upgrading the factory head bolts is a necessity to avoid a lifted cylinder head
Precision machined 12 sided wrench perfectly fits stock water in fuel sensor
Alliant AP0039
Performance Valve Springs and Retainer Kit This combination of manufacturing processesThe XDP Performance Valve Springs and Retainer Kit XD386 are a perfect upgrade for your modified 2001 2016 GM 6. 6L Duramax. Camshaft upgrades and other modifications that increase boost require more valve control. The XDP Performance Valve Spring feature a conical design for better valve control than a standard straight spring. The conical design also allows for smaller and lighter spring retainers. Each spring undergoes a stress relief process and
