The stage 1 build comprises of forged internals that will reliably allow for up to 600kw with the appropriate accessories, options for the head range from standard to stage 3 (listed separately), additional headwork will assist in the power delivery. This build applies to RB25/26/30 engines. Stroker kits available for RB26 (2.8lt) and also the RB30 (3.2lt).

Moving to a stage 2 build will increase your power capability to 900kw with the appropriate accessories. Stage 2 haed is recommended for this build. ​This build applies to RB26/30 engines. Stroker kits available for RB26 (2.8lt) and also the RB30 (3.2lt).

The stage 3 is the extreme build and recommended for racing use​, in this build the RB30 is used as the base with the option of stroking it to 3.2lt for maximum performance gains.