Camshaft choice has a direct influence on how an RB26DETT delivers power and drivability. The Tomei Procam Camshaft Set (part number TA301A-NS05F) is a matched intake and exhaust pair designed for the Nissan RB26DETT, with particular suitability for the Skyline R34 GT-R, featuring a 272° duration and 10.25 mm lift profile that balances improved performance with stronger street manners than more aggressive specifications.
Tomei’s VALC profile (Velocity, Acceleration, Lift, Control) is engineered to open the valves more effectively and maintain greater area under the lift curve relative to many conventional designs of similar duration. This supports increased airflow and improved power potential while controlling valve acceleration and closing rates to help limit unnecessary valvetrain stress. The result is a camshaft package well suited to builds seeking noticeable gains without moving fully into race-only territory.
These Procam 272-10.25 shafts are a popular choice for performance-oriented R34 GT-R and RB26DETT engines where stronger mid-range and upper-rpm output are desired alongside usable street characteristics. Supporting components and proper engine management tuning are recommended to extract the full benefit and ensure reliable operation. At Terra Firma Automotive, we supply this genuine Tomei Procam Camshaft Set as a capable upgrade for builders seeking a refined step up from stock. Choose Terra Firma Automotive for authentic Japanese performance camshafts that support well-rounded RB26 builds.
- Genuine Tomei Procam Camshaft Set
- Part Number: TA301A-NS05F
- Application: Nissan RB26DETT
- Fitment focus: Skyline R34 GT-R (BNR34)
- Duration: 272°
- Lift: 10.25 mm
- Matched intake and exhaust set
- VALC profile (Velocity, Acceleration, Lift, Control)
- Balanced performance and drivability characteristics
- Increased effective airflow potential versus stock
- Controlled valve acceleration and closing rates
- Suitable for street and performance builds
- Supporting valvetrain and tuning recommended
- 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.
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