important! - Holley

---

IMPORTANT! Two-stage power valves are no longer in production and have been discontinued. Holley, through research and testing, has determined that replacing the two-stage power valve with a single stage power valve will have minimal effect on most vehicles’ performance. Depending on a vehicle’s weight and gearing, a few vehicles may require additional fuel timing delivery. With this rebuild kit, you will find our single stage power valves included. If your carburetor has a two-stage power valve, use the chart and drawings below to determine which two stage power valve you currently have and what the replacement single stage power valve will be.

2-STAGE POWER VALVE

SINGLE STAGE POWER VALVE

Example: If your current power valve is stamped 12, Holley suggests replacing it with a power valve stamped 65.

Original 2 Stage Power Valve Identification Stamp 5 7 8 9 10 11 12 13 14 16 17 20 21 22 23 25 26 30 31 84 199R10645 Date: 2-12-13

Replacement Single Stage Power Valve Identification Stamp 55 55 45 45 55 45 65 65 45 65 65 65 65 55 65 55 65 55 65 45