The BX4 Series 4150 billet main sections are a great solution when looking to upgrade or build your own custom application. With a wide variety of bore options and consistent flow design makes this a great solution for the most discerning carburetor builder.
Manufactured in our Orlando Florida facility using only the finest in domestic materials and quality procedures to ensure you get the finest carburetor main section money can buy.
Features include:
Lightweight
BLP Venturi profile providing excellent signal and increased flow.
Adjustable air bleed locations relocated for increased flow.
Available for 2 or 3 circuit applications.
Custom Venturi sizes available. (Speak with your sales representative.)
Black Anodize available.
Slight modification needed to install Holley® booster.

Main Body, BX4
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5251BX4 BX4 BILLET MAIN SECTION (BARE)
The Billet BX4 4150 style main sections from BLP. This unique, lightweight main section is a great way to upgrade your existing application. These...$210.25... more info -
5251BX4RK BLP BX4 MAIN BODY RETROFIT KIT
These 650-750 and 850 complete lightweight Billet BX4 main sections are a great addition to your 4150 series carburetor. Just bolt on and run. Bodies...$310.25... more info -
5251CBX4 BX4 BILLET MAIN SECTION COATED (BARE)
The Billet BX4 4150 style main sections from BLP. This unique, lightweight main section is a great way to upgrade your existing application. These...$238.25... more info -
5251CBX4R BLP BX4 MAIN RETROFIT KIT(Coated)
These 650-750 and 850 complete lightweight Billet BX4 main sections are a great addition to your 4150 series carburetor. Just bolt on and run. Bodies...$347.52... more info