Fits Chevy small block and big block engines. HEI electronic distributor with polished housings, red cap, and coil. This distributor produces a 50, 000 volt spark through 7, 500 RPM. It also offers true spark alignment for instantaneous response, a high-performance curve, premium caps with brass terminals, and a low-saturation ignition module.Pit Stop USA offers Proform Polished Performance HEI Distributor - Chevy V-8 66941R at low everyday prices. Be sure to check out all of our products from ProForm including ProForm ProForm Distributors.