well if you are not going single then the medium is all you should. this is unless you stay with twins by means of BNR or something of the sort. the large m2 will just wear your turbos out all too fast. its efficient but the pressure drop will make your turbos run 12lbs just to see 10 in the manifold(example not exact numbers). kinda like FMIC. tell you what, ill become your own personal mechanic to live in the playboy mansion. ill just make your car fast, you just get me the bunnies. sigh, i hope my GF wont read this post.
kris