Engine & Performance Warehouse R1850 600 CFM 4-Barrel Carburetor Holley 1850 Series

The R1850 is a 600 CFM four-barrel carburetor based on the legendary Holley 1850 series — one of the most trusted and universally recognized carburetor designs in automotive performance history. Rated at 600 CFM, this Model 4160-style carburetor features vacuum secondaries and a single fuel inlet, making it an exceptionally versatile choice for a wide range of street and mild performance applications.

Key Features:

• 600 CFM airflow rating — ideal for stock to mildly modified engines
• Model 4160 design with vacuum secondary operation for smooth, load-sensitive throttle response
• Vacuum secondaries compensate for varying vehicle weights, gear ratios, and transmission types
• Single fuel inlet for simplified installation and plumbing
• Mechanical choke for reliable cold-start performance
• Square-bore flange — compatible with Holley, Edelbrock, Carter AFB, and Autolite-style intake manifolds with 5-3/16" x 5-5/8" bolt pattern
• Compatible with GM, Chrysler, and Ford automatic transmission kickdown linkage

The 1850-series carburetor is widely regarded as one of the most dependable and tunable carburetors ever produced, with decades of proven performance on the street and strip. It is calibrated to deliver strong performance right out of the box and is well-suited as a direct replacement or performance upgrade for carbureted V8 applications.

Note: This carburetor is intended for use on uncontrolled (non-emissions controlled) vehicles only, as defined by applicable federal and state regulations.