Holley 26-36 | Carburetor Power Valve Block-Off Plug

Racers sometimes will prefer to run without a power valve. In these cases a power valve plug must be used to block the power valve circuit. Furthermore, jet sizes must be increased to compensate for loss of the fuel enrichment provided by the power valve. An increase of 6 to 8 jet sizes will, in most cases, be enough compensation. It is advisable, however, to read the spark plugs and verify proper jetting.

• Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
• Power Valve Plug & Gasket
• For Model 2300™; Model 4150™; Model 4160
• 1/2-28 Thread
• One Plug and Gasket
• Power Valve Plug & Gasket; Valve Thread 0.5 in.-28; Models 2300/4150/4160/4500 Carbs;
• Carburetor Accessories