HOLLEY 850 CFM DOUBLE PUMPER carburettor

Product Overview

The Holley 0-4781C Double Pumper® is an industry-standard 850 CFM 4-barrel performance carburetor designed for aggressive street/strip and dedicated motorsport applications. Finished in classic corrosion-resistant gold dichromate, this Model 4150 carburetor features mechanical secondaries and dual accelerator pumps to ensure immediate, unhesitating fuel delivery during hard acceleration.

Optimised for lightweight vehicles with manual transmissions or high-stall automatics featuring low rear-end gear ratios, the 0-4781C comes 100% wet-flow tested from Holley to guarantee crisp out-of-the-box performance and legendary durability.

Key Features

• ☑ 850 CFM Rating: High-flow 4-barrel capacity tailored for high-horsepower performance engines.
• ☑ Dual Accelerator Pumps: 30cc primary and 50cc secondary pumps supply immediate fuel under throttle load.
• ☑ Mechanical Secondaries: Direct linkage provides immediate, linear secondary throttle opening.
• ☑ Gold Dichromate Finish: Classic race aesthetics with superior protection against fuel corrosion.
• ☑ 4-Corner Idle Tuning: Enables precise idle mixture control across all four throttle bores.
• ☑ Manual Cable Choke: Cable-driven hand operation for precise cold-start management.
• ☑ Wet-Flow Tested: 100% factory bench-tested by Holley technicians to ensure immediate reliability.