well Mountune do Stage 1 165bhp (thats mine) and Stage 2 185bhp so reckon they know what they are doing (Ford approved) so 200bhp should be ok. The Likes of Pumabuild/Pumaspeed offer 190bhp kits too. Jamsport do supercharger kits that start around the 200bhp so probably the guys to speak to, they can offer you 300bhp+ bonkers !