WHEN FIRST INTRODUCED THE LARGEST SIZE PISTON YOU COULD BUY FOR A B-BOMB WAS 55.40mm.

AS A RESULT ENGINE BUILDERS STARTED TO INSTALL BM 130 WITH A DIFFERENT PIN HEIGHT PISTON IN ORDER TO SAVE A ENGINE THAT THE BORE HAS OUT GROWN 55.40mm

IN ORDER TO DO SO,BUILDERS HAD TO CHANGE THE DECK HEIGHT OF THE ENGINE IN ORDER TO COMPENSATE FOR THE PIN HEIGHT DIFFERENCES BETWEEN ENGINE MAKERS BY DECKING THE ENGINE CASE .

OUR SPACER RESTORES MODIFIED ENGINE CASE TO FACTORY DECK HEIGHT SET BY KOMET ENGINEERS.

NOTE DOES NOT FIT K99