NEW HOLLEY 122-1132 Extended Methanol Main Jet ||
Holley alcohol jets are specially designed to work only with the following model 4150 HP carburetors:
0-80542 (650 CFM), 0-80535 (750 CFM) and 0-80498 (950 CFM).
Theunique metering blocks used with these carburetors are designed to accept the physically larger size of this main jet.
EXTENDED LENGTH; DRILL SIZE .132