The most notable change present is the inclusion of BMW's VANOS variable cam timing system on the intake cam.

Two versions of Honda's i-VTEC system can be found on K series engines; variable timing control (VTC) can be found on the intake cam of both versions.

On top of the variable cam timing used on the intake cam of the naturally aspirated it also has variable valve lift by using Cam Profile Switching (CPS).

RB25DE and DET engines produced from August 1993 also featured NVCS (Nissan Variable Cam System) for the intake cam.

It adopted direct push and a high lift cam like Toyota, but the timing belt drives only the exhaust camshaft; the method of driving the intake cam is synchronous from there.

It features intake cam VVT.

It has NDIS (Nissan Direct Ignition System) and CVTC with hydraulic actuation on the intake cam and electromagnetic on the exhaust cam.

It was later discoverd by enthusiasts that Ford had put a less aggresive intake cam in the 3.2L motor to maintain the same horsepower rating as the 3.0L, while still having more torque.

All ITR 1998+ have a slightly larger intake cam.

This engine features Toyota's VVT-i, variable valve timing system on the intake cam and a compression ratio of 10.0:1.