Bit of an update, lost all compression in engine got about 60psi in all cylinders, took it all to bits to find the head was warped, made a bit of a discovery while i was it and found out that it was actually fully forged to come across shiney wossner pistons Start of the strip down Typed this code into google on the top of my piston and came a wossner pistion part number 74.5mm So later on in the week i got my head back from the machineist's Bought all the bits i needed to build it back up!! A wee parcel arived today too, sold my astra vxr recaros and bought some fixed buc