Cylinder Head $ 110.00 SKU: AP8600001U Cylinder head to suit the RS250 MK1 and MK2 models. Back to: Engine Parts ×Close Aprilia Aprilia motorcycles. http://www.aprilia.com/it_IT/ Description These cylinder heads have been fully cleaned and inspected. This head has a few marks on the combustion chamber but still very useable. Genuine part number: AP8600001. Both LH and RH heads are identical.