Flame Thrower Street/Strip distributors have a speciallFlame-Thrower Street/Strip distributors have a specially designed HEI distributor module and coil combination which operates without misfire beyond 7500 RPM. That's nearly 3000 RPM higher than most stock HEI Distributors. Race HEI Distributors feature an electronic HEI Distributor module and 50,000 volt coil combination that optimizes spark energy and peak current to the spark plug in the 6000 to 8500 RPM range.y designed module and coil combination which operates without misfire beyond 7500 RPM