piston88Because K20 and K24 heads all share the same 50.5cc combustion chamber volume, the compression ratio will stay the same regardless of whether you these pistons in a K24 blockhb30000 , 088074 , 1040306217. W123 W124 W201 W202 ABS HYDRAULIC UNIT, BRAKE PRESSURE REGULATOR Sale! € 3,000.00 Orinal price was: €3,000.00. € 1,000.00