I would choose MS stg 2 intake. It makes an avg of 12 hp and 5 tq. That is basically what I got after my install. The sound is quite agressive as well as looking very "oem-like" in the engine bay. The intake compliments a pulley and primary cat delete very very well..
Peanut Butter Chunky
AD08. Akra. Huper Optik. KW V3. Macht Schnell. RE SSK. TMS.