These rare engines were used in the Tommykaira M30 based on the R31 Skyline GTS and R32 Skyline GTSt. For the R31 M30, a modified RB20DE head was bolted onto the RB30E block. It delivered 177 kW (241 PS; 237 hp) at 7000 rpm and 294 N⋅m (217 lb⋅ft; 30.0 kg⋅m) at 4800 rpm.[23]
For the R32 M30, the bore was enlarged to 87 mm and increased the displacement to 3030 cc. The head was also replaced with RB26DE head. This new version delivered 206 kW (280 PS; 276 hp) at 7200 rpm and 294 N⋅m (217 lb⋅ft; 30.0 kg⋅m) at 6100 rpm.[24]
More commonly a hybrid conversion with an RB30E block and a twin cam RB25 head without a turbo.
