Here is a new 4″ Sleeve & Piston Engine Kit we have put together for the “C” & “D” Series. Includes 4 Sleeves, 4 Pistons, 4 Pins, 4 Sleeve “O” Rings, 4 Piston Ring Sets. Gaskets not included at this price, but we have them available. This Kit will work for all C & D Series, regardless of the original bore. She’ll be good for another 55 years. Call or e-mail for pricing & shipping. Our phone: 315-585-9826.