Mazworx SR20VE Stage 3 Cylinder Head All Motor

The Mazworx SR20VE Stage 3 Cylinder Head All Motor is a premium upgrade for Nissan SR20 engines, meticulously assembled to optimize performance and reliability. Built using advanced CNC machining and precision equipment, this cylinder head ensures exacting standards for a ready-to-install solution tailored to your specifications.

Comprehensive Rebuild Process

• Thorough Cleaning: Includes a hot tank cleaning to remove oil and grime, followed by sand blasting to eliminate corrosion and surface debris, restoring a uniform satin aluminum finish.
• Oil Port and Freeze Plug Service: All oil port plugs are removed, re-tapped, and reinstalled to enable optimal oil gallery cleaning. Freeze plugs are replaced for improved reliability.
• Shimless Valve Design: Equipped with Mazworx shimless valves, this head eliminates the factory shims between valve and rocker, reducing potential damage at high RPMs or rev limiter conditions.
• Valve Seats and Valves: Features the largest intake valves compatible with the SR20VE, requiring upgraded, larger aftermarket valve seats for enhanced flow efficiency.
• Port and Polish Stage 3: CNC porting reshapes the factory intake ports to maximize airflow, complementing the large valves for improved engine breathing.
• CNC Combustion Chambers: Chamber size is increased to 92mm while maintaining squish areas, optimizing compression and valve shrouding for superior combustion performance.
• Valve Guide Renewal: Valve guides are removed, replaced with Mazworx 5.5mm manganese bronze guides, and reamed for precise fitment, essential for Stage 2 and Stage 3 port and polish processes.
• Multi-Angle Valve Job Upgrade: Multiple angles and radius cuts are applied to valve seats to further enhance airflow and sealing efficiency within the 92mm combustion chamber.
• Surface Finishing: The cylinder head surface is resme-ced using a poly-crystalline diamond (PCD) tool to ensure flatness and proper sealing.
• Valve Seals Replacement: All valve seals are replaced with new high-quality components.
• Assembly and Adjustment: Full assembly includes installation of valves, springs, and retainers, followed by careful valve lash setting according to camshaft specifications.

Recommended Components and Options

• Included hardware features Mazworx shimless intake valves (+2.85mm x 5.5mm stem), exhaust valves (+0.85mm x 5.5mm stem), Supertech titanium retainers, dual valve springs rated at 93lb, manganese bronze valve guides, Viton valve seals, oil port pipe plugs, and freeze plugs.
• The head is optimized for use with the Kelford 184-EK camshafts, which eliminate the center lobe in favor of outer lobes only; suitable for racing applications.
• Optional machining services include modifications for Hall Effect sensor installation and for upgrading to 1/2″ head studs, recommended for builds exceeding 600hp.
• Core heads can be sent in for rebuild or purchased as part of a complete motor, with options to include additional motor parts as requested.

This cylinder head strikes a balance between advanced engineering and dependable construction, making it a strong choice for enthusiasts and racers seeking enhanced airflow, durability, and performance for Nissan SR20VE-powered vehicles.