Tomei Camshaft Set, Procam RB26DETT 282-10.80 For Nissan Skyline R34 GTR TA301A-NS05K

Camshaft selection plays a major role in how an RB26DETT makes power. The Tomei Procam Camshaft Set (part number TA301A-NS05K) is a matched intake and exhaust pair designed for the Nissan RB26DETT, specifically suited to the Skyline R34 GT-R, with a 282° duration and 10.80 mm lift profile aimed at higher-output applications.

Tomei’s VALC profile (Velocity, Acceleration, Lift, Control) is engineered to open the valves more aggressively and hold them open longer relative to many conventional designs of similar duration. This increases the effective area under the lift curve, supporting greater airflow and improved power potential. At the same time, the profile is developed to control valve closing rates and lobe travel on the lifter surface, helping reduce unnecessary valvetrain stress when the camshafts are properly matched with supporting components.

These Procam shafts are intended for performance-oriented builds where increased airflow and stronger mid-to-high RPM output are priorities. Supporting upgrades such as appropriate valve springs, and professional engine management tuning, are typically required to realize the full benefit and ensure reliability. At Terra Firma Automotive, we supply this genuine Tomei Procam 282-10.80 Camshaft Set as a serious valvetrain upgrade for R34 GT-R and RB26DETT builders. Choose Terra Firma Automotive for authentic Japanese performance camshafts that support capable, high-output RB26 builds.

• Genuine Tomei Procam Camshaft Set
• Part Number: TA301A-NS05K
• Application: Nissan RB26DETT
• Fitment focus: Skyline R34 GT-R (BNR34)
• Duration: 282°
• Lift: 10.80 mm
• Matched intake and exhaust set
• VALC profile (Velocity, Acceleration, Lift, Control)
• Designed for higher power applications
• Increased effective airflow potential
• Controlled valve acceleration and closing characteristics
• Requires supporting valvetrain components and proper tuning
• Suitable for performance and high-output builds
• Trusted Japanese camshaft engineering
• Available from Terra Firma Automotive

Compared to standard profile camshafts of the same lift, VALC profile camshafts are able to then then off-set the difference for even greater lift/performance gains.

Strict phase angle tolerances minimize the risk of valve timing issues and ensures each valve opens and closes precisely. Tomei research showed that some camshafts from other manufacturers had more than 5 degrees difference in the phase angle! This makes it near impossible to achieve the correct valve timing.

• Optimized 'velocity' and 'acceleration'.
• Designed for high power setups.
• Optimizes engine performance.
• Higher lift than other profiles of the duration.
• Reduced stress/wear on the valve train.