PerTronix Flame-Thrower Race HEI Distributors are great for both Circle Track and drag race applications where factory-type HEI distributors are mandated, producing 42 percent more energy in the coil, with 46 percent faster spark breakdown time. 48 percent more peak current to reaches the spark plug, compared to PerTronix Street/Strip HEI distributors. Big performance improvements over stock HEIs and most aftermarket HEI distributors. Specially designed vacuum lockout mechanism prevents timing adjustments that change rotor phasing, adversely affecting the burn time and efficient fuel combustion. Rotor plates are TIG welded to the mechanical advance mechanism, preventing high-rpm distortion and improving mechanical reliability. New aluminum housing cast is machined from lightweight A384 alloy. Includes high dielectric strength cap with solid brass terminals, a balanced rotor, low-resistance center coil brush, nylon rotor hold-down screws. Factory-installed high-performance mechanical curve kit, with precision-machined weights and center plate. Hardened machined steel and electronic module and coil combination that performs great in the 6, 000 to 8, 500 rpm range.Pit Stop USA offers PerTronix Flame-Thrower Race HEI Distributor - Magnetic Pickup - Mechanical Advance - Red Cap - Chevy Big, SB D1071 at low everyday prices. Be sure to check out all of our products from PerTronix Performance Products including PerTronix Performance Products Pertronix GM Distributors.