look buddy it all depends wat u want out of it ok i kept with the rb 20 i had to change cos had no compression in 1st cylinder. but i like the 20 i think the sound heaps better then the 25 and i didnt have to do all the wiring loom or change anthing else
i nice turbo upgrade, injectors, full exhaust, computer, front mount and coil packs and u will be looking towads the 230rwkw anyway