^ buddy is right, the skunk 2 and aebs manifolds are pretty much replicas of the stock type R intake manifold, if you want a manifold with a bigger plenum and better intake velocity then go with the edelbrock IM's, throttle body size? keep the stock type R one as a bigger one wont really provide any noticeable gains. and skunk 2 pro 2 cams would be a good choice if your looking to spend the extra money for tuning and maybe even some higher compression pistons . . . btw im the guy that owns/drives the flat black coupe