Speedmaster PCE536.1004 Billet Aluminum Rear Main Seal Retainer for Chrysler 383 440

The Speedmaster PCE536.1004 is a precision-machined billet aluminum rear main seal retainer designed specifically for Chrysler big block 383 and 440 engines. This upgrade component replaces the factory cast iron or stamped steel retainer with a lightweight, durable aluminum piece that provides superior sealing and longevity.

Key Features:

• CNC-machined from high-quality 6061-T6 billet aluminum for precise fitment and durability
• Lightweight construction reduces rotating assembly weight compared to OEM cast iron
• Improved sealing surface helps prevent rear main seal oil leaks
• Includes all necessary mounting hardware for complete installation
• Direct bolt-on replacement for Chrysler 383 and 440 cubic inch B/RB series big block engines
• Anodized finish resists corrosion and provides a professional appearance

This rear main seal retainer is ideal for engine rebuilds, performance upgrades, or addressing chronic oil leak issues on classic Mopar applications. The precision machining ensures proper crankshaft clearance while maintaining optimal seal compression for reliable, leak-free operation.