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Why use a power valve block off? If you have a dedicated race engine that never sees part throttle, but goes right from idle to full throttle you may see more consistency. The block off screws right in place of the existing power valve. Includes gasket.
Mr. Gasket Power Valve Block-Off Plug - 1510
$17.73
Features:
- Can offer more consistency on racing engines
- Screws right in place of Holley power valve
- Gasket included
Product Specifications:
- Product Details: For Model 2300, Model 4150, Model 4160, Model 4500 Holley Carburetors
- Part Type: Carburetor Power Valve Block-Off Plug
- Product Type: Power Valve Plug
- Weight: 0.05