- Not vehicle specific. Customer is responsible for confirming this product fits their vehicle.
Holley 121-8 - Discharge Nozzle Screw - Hollow (Hex head)Holley'standard Main Jets are made from the highest quality materials, and guarantee to deliver superior functionality and durability. These jets created to fine-tune your carburetor for street or race.
- Carburetor Jet
- Standard Main Jet
- 1/4-32 UNF Thread
- Hole Size 0.1285 in.
Holley was founded by the Holley brothers in the 1900s and they became industry leaders in fuel system technology. Over 250 000 000 carburetors have been manufactured over the years for everything from Henry Ford's original Model A to the baddest factory muscle cars. In 2003 the company was one of the four original suppliers still selling to Ford after 100 years.