Mazworx SR20DET Stage 3 Cylinder Head

The Mazworx SR20DET Stage 3 Cylinder Head is a premium, custom-built performance head designed for Nissan SR20 engines, compatible with S13 and S14/S15 chassis. Each cylinder head is crafted to your exact specifications using advanced CNC machining and thorough quality procedures, ensuring a ready-to-install component that maximizes engine potential.

Comprehensive Preparation and Cleaning

• Hot Tank Cleaning: Removes all oil and grime for a clean starting surface.
• Sand Blasting: Eliminates corrosion and debris from the head, delivering a uniform satin aluminum finish and enhanced visual appeal.
• Removal and Reinstallation of Oil Port Plugs: Allows thorough cleaning of all oil galleries for optimal oil flow.

Precision CNC Machining and Performance Enhancements

• Machining for Threaded Freeze Plugs: Freeze plug locations are CNC machined to fit the Mazworx threaded and O-ringed freeze plugs, improving reliability.
• Stage 3 CNC Porting: Developed with extensive flow bench testing to maximize port and seat airflow for higher performance.
• CNC Combustion Chamber Reshaping: The combustion chamber is opened up to remove squish areas that can cause detonation under high boost, while enhancing valve breathing by deshrouding valves.

Valve and Rocker Upgrades

• Valve Guide Renewal: Removal, reinstallation, and reaming of valve guides, replaced with durable Supertech bronze guides to restore original specifications.
• Multi-Angle Valve Job: Multiple angle cuts improve airflow and sealing, optimized for the 90mm combustion chamber.
• 1/2″ Head Stud Hole Machining: Head stud holes are drilled to accommodate stronger 1/2″ studs; dowel pin locations are machined for 16mm dowels.
• Valve Seal Replacement: Old valve seals are replaced with new Viton seals for consistent valve operation.
• Assembly: Professionally assembled with valves, springs, and retainers to ensure durability and performance.
• Dual Guide Conversion and Rocker Setup: Rockers are machined to accept dual guides, with lash level set precisely for solid pivots using a combination of customer-supplied and new guides.

Surface Finishing

The cylinder head is resurfaced using a poly-crystalline diamond (PCD) tool to create a precise, flat mating surface.

Included Components

• Supertech +1mm Intake Valves
• Supertech +1mm Inconel Exhaust Valves with 6mm stem
• Supertech Dual Spring Kit (106 lbs) with Titanium Retainers
• Supertech Bronze Valve Guides
• Viton Valve Seals
• Oil Port Pipe Plugs
• OEM Guides (8 pieces)
• Mazworx Threaded Freeze Plugs
• Tomei Solid Lifters
• Kelford Cams

Customer Requirements

• Virgin core SR20 head with matching cam caps
• Usable rocker arms

The Mazworx SR20DET Stage 3 Cylinder Head is the ideal choice for enthusiasts seeking a high-quality, CNC-ported cylinder head that balances reliability with improved airflow and performance enhancements. Expert machining, quality components, and precise assembly come together to deliver a bolt-on upgrade ready to support higher engine outputs.