VR38 STAGE 3 CYLINDER HEAD PACKAGE | NISSAN GT-R R35 | GSC S3 CAMSHAFTS + SUPER ALLOY VALVES

The Subzero Motorsports VR38 Stage 3 Cylinder Head Package is engineered for serious performance builds where airflow, durability, and valvetrain stability are critical under extreme conditions.

At the core of this package is the GSC Power-Division S3 billet camshaft set, designed for aggressive lift and duration to maximize airflow and support large turbo setups operating at high boost levels.

To match this, the head is equipped with oversized +1mm Super Alloy intake and exhaust valves, significantly increasing flow capacity while maintaining strength under extreme heat and pressure. The upgraded 6.6mm stem exhaust configuration improves durability and reduces failure risk in high-stress environments.

The valvetrain is reinforced with GSC’s extreme pressure conical spring kit paired with titanium retainers, ensuring precise valve control at high RPM and eliminating valve float in demanding race conditions.

Finished with SZM copper valve seats and jack bolts, this package is built for maximum sealing, heat transfer, and long-term reliability in high-horsepower applications.

This is not a mild upgrade — this is a race-focused cylinder head solution for builds pushing the limits of the VR38 platform.

Included Components:

• GSC Power-Division Intake Valve Guides with Stopper (GSC3046-12)
• GSC Power-Division 6.6mm Exhaust Valve Guides with Depth Step (GSC3143.001-12)
• GSC Power-Division Viton Valve Stem Seals (GSC1050)
• GSC Power-Division Extreme Pressure Conical Spring Kit with Ti Retainers (GSC5089)
• GSC Power-Division +1mm Super Alloy Exhaust Valves (GSC2053-12)
• GSC Power-Division +1mm Flat Face Intake Valves (GSC2058-12)
• GSC Power-Division Billet S3 Camshaft Set (GSC7045S3)
  
• SZM GT-R R35 Jack Bolts

Included Services:

• CNC Porting
• CC Chamber
• High jack bolt installation
• Decking/CNC Facing
• Valve Lapping
• Shim Setting
• Spring height adjustment
• Valve Guide installation
• Valve Guide honing
• Initial Inspection & Prep/cleaning (chemical / ultrasonic)/Crack testing /Deck
  
• Seat Cutting (multi-angle assumed)
• Assembly