The COMP Cams Hi-Tech Timing Chain Sets for Ford Coyote engines are designed to withstand the stresses of upgraded, modified applications and are the perfect choice when replacing fatigued, worn out factory chains. Any time the cams are being upgraded in a Ford Coyote engine, or it is being built for high RPM racing use, replacing the tired, stock timing chains is a must. The new COMP Cams Hi-Tech Ford Coyote Timing Chain Sets feature heavy-duty secondary chains with 15% thicker plates than the factory chains, which helps to prevent common secondary chain failure. These kits also include premium quality primary chains that are ideal for any high performance or racing application. Whether simply upgrading camshafts or doing a full race engine build, these timing chain sets provide the durability needed in aggressive racing environments. Sets include two primary and two secondary chains.