hey guys got a bf f6 and looking to do some more mods to it so far has injectors , turbo flapper and housing and actuator done and tuned , now im looking at going a complete kit from either process west , rapid or plazmaman im not chasing mega power around 350kw would be more than enough . is it worth going the 4'' airbox over the ubp ? is it worth getting a plenum at this sort of kw ? also which kit would be the best to get , im looking more towards process west at the moment cheers scott