Comp Cams Engine Timing Set - Keyway Adjustable Billet Timing Set for Chevrolet. Engine > Valve Train Components > Engine Timing Set. Keyway Adjustable Billet Timing Set for Chevrolet 265-400 Small Block. For more than 35 years, the COMP Cams® mission has never changed: to produce the highest-performing products possible, provide customers with superior service, and to lead the industry in technological development. While the COMP Performance GroupT has grown to multiple companies and hundreds of employees, we still retain the competitive spirit and desire to be the very best that has positioned COMP Cams® as the absolute leader in valve train components.