BBTV 2M574 Engine Piston Ring

Engine piston ring set for classic Ford V8s

This engine piston ring set is built for a wide range of Ford and Mercury V8 applications with a 4.050-inch bore and standard oversize specification. It uses a plasma moly top ring, chrome-treated oil ring surfaces, and a phosphate-coated second ring for controlled sealing and wear resistance.

Key features

• Fits 1958-1976 Ford and Mercury applications listed below.
• 4.050-inch bore size with standard oversize specification.
• Plasma moly top ring surface for improved ring face durability.
• Chrome-treated first oil ring surface for added wear resistance.
• Phosphate-treated second ring surface with grey iron construction.
• Steel top ring and steel rail/stainless expander oil ring design.

Detailed description

Part number 2M574 is an engine piston ring set for classic Ford and Mercury engines that require a 4.050-inch bore and standard sizing. The ring package combines a steel top ring, a plasma moly surface treatment, and a grey iron second ring to support cylinder sealing and stable operation under combustion pressure. The first oil groove uses a steel rail and stainless expander arrangement with a chrome surface treatment, while the second groove uses a phosphate-treated ring for additional wear control. This part cross-references E180K for the same application. Part number 2M574 is a direct fit for a broad group of vintage Ford and Mercury vehicles, including Ford F-100, Ford Mustang, and Mercury Monterey applications.

What it is used for

• Restoring cylinder sealing in worn or rebuilt engines.
• Reducing oil control issues caused by worn ring packs.
• Addressing compression loss from ring wear or surface fatigue.
• Supporting rebuilds that require standard bore piston rings.
• Replacing damaged or out-of-spec piston rings during engine service.

Installation notes and tips

Verify bore size, groove dimensions, and ring end gap before installation. Confirm the engine matches the listed 4.050-inch bore and standard oversize specification, and follow the engine builder’s ring installation and break-in procedures. Fitment includes Ford F-100, F-150, F-250, F-350, F-500, Mustang, Fairlane, Galaxie 500, and multiple Mercury and Edsel applications; review the full fitment list for exact year coverage.

Quality assurance

Use this part only where the listed bore and ring specifications match the engine build requirements. The ring materials and surface treatments are selected for sealing performance and wear control in rebuild applications.