NOS Nitrous Micro Switch - Holley 4150 Carburetors NG21 a larger hole will "shoot"

a larger hole will "shoot" the fuel at a faster rate

Steel double adjusters increase adjustment capability of control arms

Racing produces a tremendous amount of vibration

1/4-3/8 in Grip Range

NOS Nitrous Micro Switch - Holley 4150 Carburetors NG21 a larger hole will "shoot"NOS Micro Switch Bracket 16512NOS Billet Holley 4150 Micro Switch Bracket Product Description: Nitrous Micro Switch Bracket Included Holley 4150 Carburetors 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