EB mods is a comapny www.ebmods.com they do stuff to the insides of the engine to give it more power and speed, like add more ports on the piston, bigger ports, polish the sleeve, and probably some other stuff, all resulting in more power, speed, maybe better fuel economy, and a bigger smile on ur face lol well hopefully. If i was you i would stick in the RB cause that should be mean as!