Speedmaster Valve Seat Set 4/Set Mopar Chrysler BB 383 440 Intake +0.010 PCE283.1008

This Speedmaster valve seat 4-piece set is engineered for Mopar Chrysler Big Block 383 and 440 engines, featuring intake valve sizing at +0.010 oversized specification. Valve seats are critical cylinder head components that create a precision seal between the valve and the head, ensuring proper combustion chamber sealing and optimal engine performance.

Designed as a direct fit for classic Mopar Big Block applications, this set delivers the durability and precision engineering required for restoration, performance rebuilds, and racing applications. The +0.010 oversized specification accommodates valve wear and guides engine builders toward proper valve-to-seat concentricity. Whether you're restoring a vintage muscle car or building a high-performance Big Block engine, this valve seat set provides the foundation for reliable compression and efficient combustion.

Key Features & Benefits

• 4-Piece Set: Complete set of four valve seats for full intake manifold coverage on Big Block applications.
• Mopar Big Block Fitment: Engineered specifically for Mopar Chrysler 383 and 440 cubic inch engines.
• Intake +0.010 Sizing: Oversized specification accommodates valve wear and precision boring requirements.
• Precision Construction: Speedmaster delivers exacting dimensions for reliable sealing and optimal valve contact.

Specifications

Ideal Applications

• Engine rebuilds and restoration of classic Mopar 383/440 vehicles
• High-performance Big Block engine builds and upgrades
• Cylinder head machining and valve seat replacement
• Racing engine preparation and tuning