NOS Nozzle Mounting Kit - 1/2 in hole - 1/16 in Inside Thread - Brass/Steel H760C42XXL GM P/N 12558253

GM P/N 12558253

Full One Year Warranty

Aluminum hold-down fits most aftermarket distributors and magnetos

Two 1/4 in NPT Female Ports

For Holley 4500HP Dominators

NOS Nozzle Mounting Kit - 1/2 in hole - 1/16 in Inside Thread - Brass/Steel H760C42XXL GM P/N 12558253NOS Nozzle Mounting Kit 17283NOS Fla Pipe Fitting Product Description: Nitrous Oxide Nozzle Mounting Kit 1 2 in hole 1 16 in Inside Thread Brass Steel Natural Kit The use of nitrous oxide as a performance enhancement has been used since World War II. Allied aircraft used it for emergency boosts in airspeed and altitude capabilities. By the end of World War II, jet propulsion had been invented and the United States' government was losing interest in