Easy to install and compatable with all standard camshaftsSAE 660 silicon bronze thrust ring included in most applicationsAxial needle and cage forward thrust bearings to reduce frictionRugged Cr40 alloy steel gears assure prolonged trouble-free operationDesigned for precise multiple cam timing adjustmentsReplace your stock timing chain with a CNC machined dual gear drive. Unlike timing chains, gear drives will not stretch or wear prematurely. Most applications require little or no machining and fit under the majority of stock timing chain covers. Whether it's on the street or on the strip let a PRW dual gear drive help you make more horsepower.