A wheel cylinder is a vital component in your 1976-1981 Firebird's drum brake system. Wheel cylinders are located on each wheel and exert force on the brake shoes to bring then in contact with the drum. The resulting friction is what stops your car. Over time, wheel cylinders begin to leak and cease to properly function. Eckler's Firebird offers replacement wheel cylinders to get your brake system back in top shape. These cylinders install quickly and easily with just a few simple hand tools. When it comes to parts for your 1976-1981 Firebird, look no further than AmericanClassic.