Mazworx SR20 Sleeved Block Stage 2

The Mazworx SR20 Sleeved Block Stage 2 package offers a comprehensive engine block prep solution tailored for Nissan SR20 enthusiasts aiming for a robust, high-performance street build. Ideal for engines producing up to 600 horsepower, this package incorporates precision machining and high-quality components to ensure durability and performance reliability.

Key Features

• Hot Tank Cleaning: Thorough washing removes oil, dirt, and grime, preparing the block for machining and assembly.
• Sand Blasting: Restores the block’s exterior by removing corrosion and debris accumulated over years, revealing a uniform satin aluminum finish for improved aesthetics.
• Darton Dry Sleeves Installation: High-strength ductile iron sleeves replace old ones, reinforcing the cylinders for power handling well beyond 400 horsepower.
• CNC Boring and Honing: Using a 3-axis CNC machine for precise boring and a Sunnen SV-10 cylinder hone with diamond tooling ensures perfectly centered, finely finished cylinder bores with sizes ranging from 86mm to 90mm.
• Step Deck Surfacing: The deck surface is machined so sleeves protrude slightly, concentrating clamping force for a more reliable head gasket seal under high boost conditions.
• Oil Port Plug Removal and Upgrades: All oil port plugs are removed for thorough cleaning and replaced with CNC-machined, O-ring sealed threaded plugs for improved sealing and ease of maintenance.
• Freeze Plugs Replacement: OEM Nissan freeze plugs are installed to ensure reliable sealing.
• Torque Plate Honing: Simulates cylinder head installation during honing to maintain cylinder roundness and accuracy under head bolt tension.
• Main Studs, Caps, and Line Boring: The block undergoes cap grinding, line boring, and line honing to maintain factory main journal specifications using custom tooling.
• Oil Groove Machining: Enables use of 5-hole main bearings for enhanced oil flow to mains and rods, a feature initially available on GTi-R and VE blocks, now offered for other blocks via CNC machining.
• Front Main Oil Squirter Upgrade: Replaces the OEM squirter with a more secure threaded version to prevent common failure points.
• RWD Oil Drain Hole Plug: Necessary for builds using VE FWD heads on RWD blocks to seal an unmatched oil drain passage.

Included Parts

• Mazworx / ARP Main Studs
• Mazworx Front Oil Squirter
• Mazworx Threaded O-ring Plugs
• Darton Dry Sleeves
• NPT Plugs
• New Oil Pump
• Mazworx Threaded Freeze Plugs
• Billet Water Connector
• Billet Breather

Note: This package requires you to send in your core block for preparation. For engines targeting above 600 horsepower, a 1/2″ head stud configuration is recommended to accommodate higher power demands.