Re: okay okay.......
RB series engines are made by Nissan and most commmonly are found in Skylines and Cefiros, they come in 2, 2.5, 2.6 and 3L varieties, the RB30s are not double overhead cam though. The 2.6L twin turbo engines are the Skyline GTR engines and are well known for going up to 1200 odd hp with lots of mods and money invested. Stock an RB25 or RB26 turbo or twin turbo is around 280hp.