Soldato
I've had two MB6's both were in excellent condition and as much as Johnnycoupe would like to believe the engines are different between the UK and JDM versions of the B18C4 the only differences are the engine map which are interchangeable and a slight compression difference
6% isnt slight when you then go onto talk about the engine calibration where compression ratio is a key part of your ignition timing. What did any of the Mb6 modified in such a manner run on a rolling road? The same p72 map on my car ran 5bhp less on a very similar modded B18c4 in Rover hatch.