GMC Sierra Variable Timing Sprocket increases the power and flexibility of the engine by allowing the camshaft to open and close the valves at the highly efficient times. In factory form, the Variable Timing Sprocket aligns its timing marks with those on the crank gear, which is an easy way to go about things when driving around, but it will leave performance on the table if the timing marks drift a couple of degrees. To stretch every last horse out of a GMC Sierra V8, builders fit the Variable Timing Sprocket in a matched set with fresh chain, crank gear, tensioner and guides, and fine-tune it with a degree wheel. Two basic styles of Variable Timing Sprocket have been seen over the years. One style has several keyways in the crank gear, allowing quick selection of advancing or retarding cam timing. The other style is based on offset bushings or elongated cam-gear slots to enable minute adjustments of the cam to favor either low-end torque or high-rpm power. Whichever style you choose, maintaining the Variable Timing Sprocket in exact phase protects the signature pull drivers expect from GMC trucks and makes every Sierra crisp under throttle.
Each OEM GMC Sierra Variable Timing Sprocket we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.