Experts agree that good HEI ignition systems rely on a good module and a good coil. We believe that the combination of a great module and a great coil makes our Flame-Thrower distributor the best. We've engineered our module and coil to work together, to provide you with superior ignition performance on the street or track. Compare the Flame-Thrower High Performance Module and Coil to an Original GM HEI distributor and you will find these improvements: Operates without misfires up to a minimum of 7500 RPM, nearly 3000RPM higher than most enthusiast report with their original HEI* Produces 67% more energy in the coil Spark breakdown time (the amount of time until the spark plug has enough voltage to spark) is 45% faster resulting in more accurate timing throughout the RPM range Delivers twice the energy across the spark gap (during a one millisecond burn time) Spark duration and more energy to the spark allows wider plug gaps (. 050" - . 055") increasing flame kernal growth One Year Limited Warranty Dramatic improvements, not just because of a great module and coil, but because they've been designed to work as a team to produce these results!Pit Stop USA offers PerTronix Flame-Thrower Street/Strip HEI Distributor - Machined Housing - Magnetic Pickup - Vacuum Advance - Red Cap - Chevy Big, SB D1051 at low everyday prices. Be sure to check out all of our products from PerTronix Performance Products including PerTronix Performance Products Pertronix GM Distributors.