I have a very similar set up on my MB ( type r cams, skunk 2 inlet,skunk 2 70mm throttle body, 4-1 manifold,de-cat,cold air induction kit,full exhaust) currently I'm running a stock B18C4 ecu and she runs sweet as a nut with no engine management light on,drives fine and all I did was plug in the vacuum valve for the 2 stage inlet which is all you'll have left over from changing the inlet manifold As for ECU though - on the 2nd of September Performance Auto Works are fitting me a Hondata S300 ecu with slight wiring mods and then tuning the whole car on a dyno.i would recommend getting yours re mapped as I do feel mine is slightly holding back due to the amount of mods carried out. Ultimately it will run better with a re map! I'll let you know how I get on and then I'll be in a better place to advice