Piston rings listed on this catalogue can be fitted without altering piston grooves.
Existing oil carbon must be obviously removed.
Piston ring feature, material and coating are based on original equipment of the engine manufacturers.
You will find ring set specification by the help of piston ring cross section and features.

Ordering part numbers are shown beside of each ring set either for Std size as well as for oversize.
Part numbers and prices are referred to single cylinder ring set.
Price is the same for standard and oversize.
Packs could be for single cylinder or multiple, according to stock availability.