Depends on which you order 264 cam doesnt need the bells and whistles , but if you have the money you might as well do your valves and what not , other than that they have 272 and 276 which require your valve train to be built with better quality parts and from what the b.c. Site says fully built motor, make sure you put your bearing caps back in order, all intake caps on one side front of motor starting as 1 through 7 same for exhaust caps ( everything should be punched with labelling the part, iam not sure about the bc stuff if it is labelled or not)
I recently acquired a 2001 IS300. Whqt you've done to your is almost exactly what I'm planning. I was wondering if you have any horsepower numbers? Did the sound change significantly with the cams? I was thinking about bigger injectors to compliment the cam. Opinions on that?