ok, want some big power for my r33 GTR. i already have an hks straight through system and de-cat. boost controller and performance clutch ready to be fitted. now by going to what ive read, once ive thrown up the boost i'l have around 400bhp hopefully. i was going to get a greddy emanage so i can smooth out the system niggles. but my question is, if i opt for more power without getting my turbos rebuilt (seems like a lot of hassle just for raising the power 50bhp tops), what extra mods do i need and maybe which aftermarket turbos are good for more power, any kits info. i dont want to spend millions but just some info on parts and any good suppliers would be great so i can try and work out a compromised but good build.