Holley Power Valve Plug - Fits Models 2300, 4150, 4160, 4500 DX2150K 3 x 5-1/2 in Rectangle

3 x 5-1/2 in Rectangle Outlet

Has provision for adding the PCV or breather flange at rear

750 in Rectangular Port

0 Liter Naturally Aspirated GAS

Holley Power Valve Plug - Fits Models 2300, 4150, 4160, 4500 DX2150K 3 x 5-1/2 in RectangleMain jetting will need to be increased 6 to 8 sizes when plug is used. Features: Fits Models 2300, 4150, 4160, 4500 One Plug and Gasket 1 2 28 ThreadHolley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS