Mazworx RB25 Short Block Stage 2

The Mazworx RB25 Short Block Stage 2 is expertly built to support power outputs ranging from 600 to 800 horsepower, making it suitable for both Series 2 and NEO Nissan RB engines. This short block is designed for enthusiasts and professionals seeking reliable performance enhancements within the RB engine platform.

Comprehensive Labor and Assembly Process

• Complete disassembly of the short block.
• Thorough hot tank cleaning and degreasing.
• Sandblasting followed by painting of the iron block for corrosion protection.
• Machining operations including threaded oil port plugs, threaded freeze plugs, and RB26 oil groove modifications.
• Inline block resurfacing to ensure precise mating surfaces.
• Resizing of cylinder bores using a torque plate for accuracy.
• Precision honing of line bores.
• Installation of an oil pump collar onto the crankshaft.
• Cleaning, inspection, polishing, and balancing of the crankshaft.
• Final assembly of the short block with high-performance components.

High-Quality Performance Parts

• CP Pistons sized at 86.5mm with a compression ratio of 9:1.
• Upgraded 9310-grade wrist pins featuring 0.250″ wall thickness for durability.
• BC ProH625+ connecting rods engineered for strength and lightweight performance.
• ACL RB26 race bearings designed to withstand high-stress conditions.
• ARP main studs for reliable main cap retention.
• Mazworx RB oil pump collar enhancing oil pump performance.
• Mazworx threaded and O-ring sealed small plugs for improved sealing and reliability.
• Mazworx threaded and O-ring sealed freeze plug kit for secure coolant sealing.

This short block combines meticulous machining, careful balancing, and premium components to deliver a foundation for high-horsepower Nissan RB engine builds. It is ideal for racing applications where reliability and performance are paramount.