The Zero-Cross Pro-Billet Distributor is the most advanced and versatile racing distributor available. Engineered for absolute performance from the inside out, the Zero-Cross Distributor provides you with separate cylinder timing adjustability in a housing that is designed exclusively for high rpm, long duration racing. With the tight engine restrictions in many race organizations, every ounce of power needs to be extracted for a race engine to be competitive. Since individual cylinders do not have the exact same requirements for ignition timing due to variables such as rpm, airflow, uneven manifold distribution and more, ideal ignition timing has always had to be a compromise. Until now.