In the 1980's BLP was the first to introduce a fully machined billet metering block for Holley^® carburetors. Since that time BLP has expanded the unassembled or assembled billet aluminum metering blocks for both gas and alcohol application. Metering blocks can be custom built with your specifications or purchased bare for the professional carburetor builder.

Features are:

• Available in the following anodized finishes: purple, gray, black
• All fuel circuits are adjustable including power valve channel
• With or without power valves
• Power valve channels are lowered
• Lowered main jets available
• BLP main jet emulsion available
• Custom logo engraving available

Gasoline Billet Metering Blocks

5124 Series
2 circuit with standard 1/4 x 32 Holley^® jet thread.
5170 Series
3 circuit that incorporates an idle tube in the main well. Uses standard 1/4 x 32 Holley^® jet thread.
5120 Series
3 circuit .850 thick that features an isolated idle circuit, which does not use an idle feed tube in the main well. All of the third circuit passages are fully adjustable. Uses standard 1/4 x 32 Holley^® jet thread. BLP 5315 bowl screws and 5205B-850 pump levers are required for these blocks.

Alcohol AND E85 Billet Metering Blocks

5130 Series for Alcohol
5130
2 circuit with standard 1/4 x 32 Holley^® jet thread.
5135L Series
2 circuit with 350 x 32 BLP L series jet thread.
5135H Series
2 circuit with 5/16 x 32 Holley_^® jet thread.
5122L Series
3 circuit .850 thick features an isolated idle circuit, which does not use an idle feed tube in the main well. All the third circuit passages are fully adjustable. Uses 350 x 32 BLP L series jet thread. BLP 5552-2.750 bowl screws and 5205B-850 extended accelerator pump arms are required for these blocks.

5122H Series for Alcohol
5122H
3 circuit with 5/16 x 32 Holley^® jet thread. BLP 5552-2.750 bowl screws and 5205B-850 extended accelerator
pump arms are required for these blocks.