655004 Engine Head - 10 Ribs - for Sealed Combustion Chamber

10-rib super-lightweight cooling head CNC-machined from Swiss 7075 T6 and additionally black-coated and laser-engraved for a stylish look. The cooling head features additionally drilled holes from the bottom to reduce the weight. The recessed contact area on the underside of the cooling head – where the combustion chamber insert fits - has had the color coating machined away to allow for the optimal heat transfer.