IMD Suzuki 1977-82 GS550 Piston Kit Set - 0.50mm Oversize 56.50mmSuzuki 1977 82 GS550 Piston Kit Set 0. 50mm Oversize 56. 50mm Original cylinder bore of 56mm. 8 Valve engine model. New reproduction piston and ring kits. Pistons are cast and replicate original pistons. Includes 4 Pistons 0. 50mm Oversize or 56. 5mm 4 Rings Sets 0. 50mm Oversize 4 Piston Pins 8 Piston Clips Fits the following models Suzuki 1977 79 GS550E Suzuki 1980 GS550L Suzuki 1981 GS550T Suzuki 1982 GS550M Replacement Piston kit designed by IMD