Jets + Powervalves

These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main jets are...

These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main jets are...

These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main jets are...

These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main jets are...

These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main jets are...

These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main jets are...

Fits Holley Model 2300™, Model 4150™, Model 4160™, Model 4500™

9.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 19 to 20 inches of vacuum at warm idle.

8.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 17 to 18 inches of vacuum at warm idle.

7.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 15 to 16 inches of vacuum at warm idle.

6.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 13 to 14 inches of vacuum at warm idle.

5.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 11 to 12 inches of vacuum at warm idle.

2.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 5 to 6 inches of vacuum at warm idle.

3.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 7 to 8 inches of vacuum at warm idle.

4.5 Power Valve Assembly - Hi-flow FOUR DOOR exclusive QFT design - Comes with replacement gasket, sold individually. This is the correct power valve for engines with 9 to 10 inches of vacuum at warm idle.