Tomei Procams are designed for serious professional performance use for high power and torque applications. Procams do require additional valve train upgrades and an programmable aftermarket ECU to configure the correct new engine management setup.

The general purpose of engine tuning is to change the torque characteristics of the engine by changing the cams duration timing and cam lift amount for maximum torque and horsepower. However, tuning the engine is not only based on that. When going into finer details by maximizing the Valves efficiency is not just about timing and height lift but to also maximize the intake efficiency. The high valve lift allows huge amounts of air in but at the same time it mechanically damages the valve train and gains added friction loss. Longer cam durations and big cam lifts deliver more power at higher engine speeds but it also gives a rough idle and at low engine speeds. Tomei engineers worked hard to produce camshafts that will deliver a well balanced profile at 1.3-1.5 times more than the stock camshaft.

Quality Control
Material Management --> Cam Polishing --> Burr Grinding -->Manganese Phosphate Coat --> Lapping --> Check --> Cleaning --> Rust Proof Treatment

Every camshaft is carefully built through these production processes. Plus, strict inspection will be given to them and only the highest quality products are shipped.

Surface Coating
The surface of the camshaft is coated with manganese phosphate in order to protect from damage even when the camshaft has not lubricated yet. This has done by steeping press process that produces 0.5mm to 15 micromillimeter thin of manganese phosphate coating on its surface to prevent from direct contact with other metal parts while realizing smooth operation.

Wavy Groove Finish by Oscillation Grinding
A wavy groove is curved to the cam profile surface by oscillation during cam grinding process. The oil pool that is formed on the cam profile surface reduces a friction loss and prevents locking.

Surface Coating
Coating the surface of camshaft with manganese phosphate in order to protect from damage even when the camshaft has not lubricated yet. This has done by steeping press process that produces 0.5mm to 15 micromillimeter thin of manganese phosphate coating on its surface to prevent from direct contact with other metal parts while realizing smooth operation.

* Tomei Solid Lifters, valve springs and shims are required for ALL Procams for the R33 RB25DET
* Adjust Shims may be required for some models.
* Head clearancing may be required