A-115017581-AI Piston Kit; Std.One New Aftermarket Replacement Piston Kit (Standard) for Perkins 400 Series Turbocharged Diesel Engines This standard bore piston and ring kit is a direct replacement for Perkins OEM part 115017581, designed for the 4 cylinder turbocharged diesel engines used across Perkins, Caterpillar (Cat), Shibaura, Case IH, and New Holland equipment. The kit fits the Perkins 404C 22T and 404D 22T indirect injection turbo engines and the Caterpillar 3024C C2. 2