55-94 350 Chevy Oil Pump

The Melling 55-94 350 Chevy Oil Pump (model M-55HV) is a high-volume, high-pressure wet sump pump engineered specifically for small-block Chevrolet applications from 1955 through 1994. This internal gear pump delivers consistent oil delivery under demanding engine conditions, making it the go-to choice for street performance, racing, and restored classic muscle cars requiring reliable lubrication at elevated RPMs.

The pump features a 5/8-inch inlet designed for standard small-block Chevy oil pan pickup tubes. High-volume displacement ensures superior oil flow compared to factory units, while the high-pressure design maintains adequate PSI across the entire rev range—critical for engines modified with aggressive cam profiles, roller lifters, or higher compression ratios. The internal gear design minimizes wear on the pump shaft and housing, extending service life in both street and competition environments. At 3.91 lbs and compact dimensions (5.15 x 4.25 x 5.95 inches), it installs directly in place of original equipment without modification.

This pump is essential for builders upgrading induction, ignition, or fuel systems on classic 283, 327, 350, or 400 small-block engines. Any modification that increases power output or engine speed demands a corresponding increase in oil delivery. The Melling M-55HV bridges that gap, preventing inadequate lubrication that can lead to bearing wear, cam lobe scuffing, and premature engine failure. Whether restoring a first-generation Corvette, building a street-rod engine, or preparing a vintage race motor, this pump ensures consistent oil pressure under all operating conditions.

Melling is a recognized OEM supplier to major automotive manufacturers and a trusted name in performance pump engineering. The M-55HV design has proven reliability across decades of small-block Chevy applications, from Sunday cruisers to weekend track motors.