The Kelford 231‑D Stage 4 Race Camshaft Set is engineered for extreme Nissan GT‑R R35 VR38DETT builds operating at very high boost and RPM levels. Designed specifically for roll racing and drag racing applications, this camshaft set provides maximum airflow and valve control for engines pushing well beyond the limits of conventional cam profiles.

With long duration and high lift on both intake and exhaust, the 231‑D camshafts are intended for fully built engines running large twin turbochargers and aggressive fuel and ignition strategies.

Camshaft Specifications

• Intake Duration: 286°
• Exhaust Duration: 286°
• Intake Cam Lift: 11.30mm
• Exhaust Cam Lift: 11.30mm

Key Features

• Complete intake and exhaust camshaft set
• Stage 4 high‑RPM race cam profiles
• Designed for extreme boost and airflow demands
• Optimized for roll racing and drag racing applications
• Compatible with E85 and methanol fuel setups
• Precision‑engineered by Kelford Cams

When Is the Kelford 231‑D the Right Choice?

The 231‑D camshaft set is intended for competition‑focused VR38DETT builds where maximum power output is the primary goal.

• Fully built engines with forged internals
• Large twin turbochargers (typically 68mm and above)
• High‑boost, high‑RPM race applications
• Roll racing and drag racing GT‑Rs
• Engines targeting approximately 1600hp and beyond

Important Notes

• Upgraded valve springs are mandatory
• Kelford recommends the KVS38‑BT valve spring kit
• Professional installation and advanced ECU tuning are required
• Not recommended for street‑driven vehicles

231‑D vs Other Kelford Cam Options

• More aggressive than 231‑C Stage 3 camshafts
• Designed specifically for high‑RPM race engines
• Less extreme than full pro‑drag profiles (231‑E)
• Ideal for serious competition builds

Application

• Nissan GT‑R R35
• Engine: VR38DETT

The Kelford 231‑D Stage 4 Race Camshaft Set is a purpose‑built solution for GT‑R owners pushing the limits of the VR38DETT platform in competitive racing environments.