Pertronix Flame-Thrower Distributor Tune-Up Kits provide everything you need to "wake up" your stock GM HEI distributor. Kits include street-strip 4-pin module and coil combination, premium rotor and cap, custom Flame-Thrower coil cover, adjustable vacuum advance canister, hi-performance advance kit, wire harness, capacitor, and hardware. The "Race Only" tune up kit is designed for HEI equipped circle track or drag racing engines. These kits include matching coil and module, wiring harness, vacuum lock out, advance weights, springs, bushings, cap, rotor, dust shield, and hardware.