Mazworx SR20VE Stage 0.5 Cylinder Head

The Mazworx SR20VE Stage 0.5 Cylinder Head is a precision-engineered upgrade designed specifically for Nissan SR20 engines, tailored to enhance the performance of your street turbo application with a reliable rating up to 400 horsepower.

Comprehensive Labor and Service Included

• Complete disassembly of the cylinder head
• Hot tank cleaning for thorough degreasing and debris removal
• Removal, drilling, tapping, and replacement of oil port plugs specific to the SR head
• Removal and replacement of threaded freeze plugs (ex 16mm standard) tailored for the SR20VE head
• Valve guide removal, reinstallation, and precise reaming
• Replacement of intake valve seats ensuring optimal seal and performance
• Multi-angle valve job for enhanced airflow and seating
• Valve lash setting with valve tip adjustments
• Head resurfacing to meet OEM specifications
• Final assembly of the cylinder head

Premium Parts Included

• Supertech standard size valves (with an option for Mazworx shimless valves for intake and exhaust)
• Supertech valve stem seals for durability
• Supertech titanium retainers offering strength and weight reduction
• Supertech dual valve springs rated at 83 lbs, optimized for the SR20VE
• Supertech bronze valve guides for longevity
• Mazworx threaded and O-ringed freeze plug kit designed specifically for the SR20VE head

Core Requirements

A virgin core head is required for this service. Customers have the option to send in their existing SR20VE head or purchase a core through Mazworx. For VVL heads, acquiring a complete motor may be necessary to source the head. If interested, please inform us about any additional parts required from the motor to facilitate shipment.

Additional Service Options and Recommendations

• Valve Springs and Retainers: We utilize Supertech dual valve springs paired with titanium retainers. Customers can select the set best suited to their specific application.
• Camshafts: The Kelford 184-T camshafts are recommended for high RPM turbocharged engines. For dedicated race engines, eliminating the VVL lobe is advised to reduce valvetrain mass and improve oil delivery at high RPM.
• Valve Guide Service: The head undergoes a remove, reinstall, and ream process for valve guides, replaced with Supertech bronze guides. This is essential for higher-stage port and polish work.
• Machining for Hall Sensor: If using the Mazworx Hall Effect Sensor Kit, the head can be machined to accept this component.
• Machining for 1/2″ Head Studs: For builds aiming to exceed 600 horsepower, we recommend upgrading to 1/2″ head studs. This service includes drilling the head and re-machining dowel pin locations for proper fitment.

Performance Flow Analysis

Extensive flow testing and analysis have been conducted comparing the stage .5 cylinder head to stock SR20VE heads for both intake and exhaust performance. These enhancements contribute to improved airflow and engine efficiency, optimizing your build for higher power thresholds.