Choose Options Compare Quick view Kohler K Piston Rings K161, K181 iSaveTractors MSRP: Now: $24.99 Was: Chrome Piston Rings for Kohler K161 and 181 Engines with a bore size of 2.938". These fit Type "A" pistons.Same High Quality Piston Rings we use to rebuild dozens of tractors per year! Replaces Kohler 232575S Kohler... MSRP: Now: $24.99 Was: Choose Options Compare Quick view Qty in Cart: 0 Price: MSRP: Now: $24.99 Was: Subtotal: Choose Options