It is currently bored to 85.5mm.

Bottom of cylinders are poorly machined and have worn the piston rings. 

You can see this in the picture of one of the cylinders.

It needs a rebore to 86mm.

The pistons are 85.5mm slightly worn and will not be of use for this engine after machining is done.

It has come from the pictured Evo 8 race car and has made great power at 651bhp ( see map )

Next plans for car require a billet block  otherwise we would reuse.