Twin turbochargers and air-to-air intercoolers, electronic engine management, redesigned cylinder heads and other modified engine internals were used.

It is not uncommon for 600 hp to be achieved without modification of the engine internals.

YZR crankcases and gearbox were used and custom made engine internals, pipes and ignition were fitted.

Hydrochloric acid (HCl) is very destructive to engine internals.

Mostly cosmetic changes, minor revision of engine internals, minor increase in power.

Such components could include exhaust systems and engine internals, and are generally within the homologation guidelines of the racing series in which the vehicles are to be used.

Some of this is achieved by less aggressive engine internals and the "low boy" exhaust header pipe.

Although kept the same 3.6-liter displacement, the V6 was able to produce 318 horsepower while dropping weight thanks to some modified engine internals.

There are no known differences with the actual engine internals, all CB70s featuring catalyst emissions control system.

The Accent WRC3, featuring new dampers and engine internals among other changes, debuted at the 2002 Tour de Corse.