BBT brought back this camshaft for you: following our research Gerald Oetinger used camshafts of the Porsche 356 pre-A in his Okrasa engines. Because today these camshafts are stranger than white blackbirds we let them be produced on the basis of the original model. So from now on you can equip your old 25 and 30 hp with this old parts… Suitable for single and double carburettor. Sold each.