Pertronix D7151710 Black Vacuum Billet Male Distributor Cap for I3 Buick V8 215-350 Multiple sparks thru the entire RPM range. Adjusts spark timing at higher RPMs to compensate for the inherent electronic delay. Integrated digital rev limiter with LED feedback for precise RPM setting. Memory safe function stores settings eliminating unintended changes to rev limit. Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance. Peak current level is reached just prior to spark for maximum energy without the heat build-up, increasing coil performance and module reliability. Built-in reverse polarity and over current protection shuts down the system, preventing component damage.