The last production model of the Fw 190 series was the A-9, which was fitted with the uprated BMW 80lTS/TH engine, nominally of some 2000 hp. This was supplied (as with previous models) as a complete power 'egg', with all its fittings, and could theoretically be interchanged with the previous BMW 801D-2. It also had a larger oil cooler and oil tank, protected by a thick armoured ring ahead of the engine (previous engine models were also protected, but usually with thinner armour). Some A-9 models also sported a rounded-top cockpit canopy as fitted to a number of the dedicated ground attack Fw 190s. Some examples are known to have been fitted with a wide-chord vertical tail resembling that fitted to the Ta 152. The type's armament remained similar to the Fw 190A-8.