Ian, Unfortunately Steve Parker who built the engine and the previous owner have passed away and no build spec came with the car. However ive had it stripped down to replace the head gasket and up-rated bottom ladder. The garage said it had bigger valves in the head and some sort of race cam. It also runs on Caterham throttle bodies with a dry sump. The MBE ECU says 200BHP, however I dont think it is so much. Oh and it only had 560 miles on the clock when I bought it in March, the garage also confirmed the engine looked low miles since it was rebuilt. That is the extent of my knowledge on it at present. Roger.