The Subzero CNC Machine Shop operates equipment that most dedicated engine builders can only aspire to. Every machine was selected for one reason: to handle the GT-R R35's VR38DETT at the demands of high-horsepower competition.

Services offered to both walk-in customers and online clients:

• CNC Porting & CC Chamber
• Water Jacket Reinforcement
• Decking / CNC Facing
• O-Ring / Fire Ring Groove Machining
• Valve Guide Installation & Honing
• Valve Seat Installation + Heat Cycle / Vacuum Testing
• Girdle Support Machining + Main Stud Threading
• Cylinder Boring and Honing with Torque Plate
• Crankshaft Machining / Line Boring
• Full Assembly Crank Balancing (crank + rods + pistons)
• Short Block Assembly + Blue-Printing
• Ultrasonic Cleaning / Chemical Prep / Crack Testing

The machine shop's equipment constitutes significant tangible asset value for the company.

Power means nothing without calibration. The Subzero dyno suite operates a ProHub Mainline dynamometer, the reference standard for high-power AWD platforms, to validate every build we produce and tune every car we touch.

Our ambitious in-house projects have pushed past 2,000 horsepower, establishing a benchmark in the GCC region. Cars carrying our tune carry the Tuned by MRJ designation, a mark that stands for consistency, repeatability, and race-day reliability.

• Stand-Alone ECU tuning (MaxxECU)
• Stock ECU tuning via ECUTEK
• Flex fuel calibration
• Drag calibration
• Roll-racing setups
• Street drivability optimization
• TCM optimization
• Launch strategy development
• Steady-state and transient pull dyno sessions
• Full data logging and calibration review
• Pre- and post-build power validation

This is where engines are built. The Subzero workshop is staffed by over 10 trained specialists whose work produced the first GT-R R35 to cover the half-mile in the Middle East. That car did not happen by accident. It happened because the people assembling it understood the platform at a level that only comes from years of building, breaking, and rebuilding the VR38DETT under real competition conditions.

Every engine that leaves this workshop is blueprinted. Clearances are measured and set to specification. Tolerances are verified, not assumed. Whether the build is a street car returning to daily use or a competition engine destined for Sweihan, the assembly process does not change. The specification is the standard, and the standard does not move.

A dedicated electrical department operates within the workshop, handling the wiring demands that serious builds require: custom harnesses, standalone ECU integration, fuel system architecture, ignition infrastructure, and safety systems. At 1,500 horsepower and beyond, the quality of the electrical work determines whether the engineering underneath it performs or fails.

• Full engine builds to street, track, and competition specification
• Blueprinted short block and long block assembly
• Fuel system design, upgrades, and installation
• Turbo system installation, plumbing, and heat management
• Custom wiring harnesses and standalone ECU integration
• Race preparation, cage fitment, and safety systems
• Routine maintenance and scheduled servicing

GR6 Transmission Building

The GR6 gearbox is one of the most sophisticated dual-clutch transmission systems ever fitted to a production performance car. It is also one of the most stress-tested components in our race program. A dedicated room within the facility is set aside solely for GR6 transmission building and inspection — every unit assembled with the same blueprinting discipline applied to the engines built alongside it.

Packages available from Stage 1 through Stage 5, configured for everything from spirited street use to sustained half-mile competition loads.

GR6 Solutions Include

• Stage 1 to Stage 5 transmission packages
• Albins gearsets
• Dodson Motorsport upgrades
• ETS 11-plate clutch upgrades
• Front differential upgrades
• Rear differential reinforcement
• Billet forks and shafts
• Drag and half-mile setups
• Final gearbox assembly and inspection

Built For

• Street use
• Roll racing
• Quarter-mile drag racing
• Half-mile competition

The Subzero fabrication department focuses on the solutions no off-the-shelf kit can provide. Where stock components reach their limit and catalogue parts run out, fabrication begins. Our team builds to the demands of the car and the ambitions of the build, not the constraints of a product catalogue.

Exhaust systems, custom turbo installations, manifolds, and bespoke structural solutions are handled in a dedicated fabrication area staffed by specialists who understand the GT-R R35 platform intimately. Every piece that leaves this department has been designed for function first, built to last under race conditions, and fitted to the precision the platform demands.

• Exhaust system fabrication and installation
• Custom turbo manifold fabrication
• Downpipe and uppipe fabrication
• Custom intercooler piping
• Intake fabrication and routing
• Custom fuel system hard lines
• Bespoke bracket and mounting solutions
• Roll cage and safety structure fabrication
• Custom turbo installation and relocation