Tomei PROCAM 274/274 Camshafts

PONCAM (Power On Camshaft) is designed as a 'drop-in' solution compatible with stock valve springs and ECU parameters. PROCAM (Professional Camshaft) features more aggressive lift and duration profiles (like this 274 spec), requiring upgraded valve springs and precise tuning for maximum performance.

Yes. The PROCAM series features high lift that exceeds the limits of the factory valve springs. You must install upgraded valve springs and retainers (such as Ferrea or Tomei) to prevent coil bind and valve float at high RPM.

With a duration of 274 degrees, these camshafts will produce a noticeable 'lopey' or aggressive idle. This is a characteristic of high-performance cams that increases overlap to improve high-RPM breathing.

These camshafts are optimized for mid-to-large frame turbochargers. They extend the power band higher into the RPM range, allowing larger turbos to breathe efficiently where factory cams would choke the airflow.

While many PROCAMs fit standard clearances, it is critical to always check piston-to-valve clearance and valve-to-valve clearance during installation, especially when combining high-lift cams with aftermarket pistons or decked heads.