Sorry mate your not alone we got an engine in built by Hills it sounds so bad its untrue one of the guys is stripping it down next to find out why it knocks like 2am cop raid and is 30bhp down to what i would expect. What winds me up he gets away with it and customer is left in a ditch with no come back and people like me having to sort out someone elses mess and not being able to charge full labour rates for someone elses mistakes, Hills is making enemies with customers and other garages alike.