take it down to your local ford dealer as it still should be under warranty.
Too right. I've heard them running low power (like 160ish) but not that low
Mines a 53 plate and just had it RR'ed at 168.7bhp @ just under 7000 rpm - its completely standard BTW. They should be 168bhp (173ps). I would hope for a realistic 175bhp with your mods though !