Set of two 100 mm high -pressure suckers for the Ducati 1000DS and 1100DS engine blocks with two valves per cylinder. These pistons are lower in weight and are so formed that they give extra pressure in the cylinder head. This results in an engine that picks up faster and gives more power. It is advisable to re -adjust the injection when assembling this set. Note: this is a 98mm oversize kit. If the cylinder is not yet 98 mm, it must be drilled and held.