The always growing request for better performance drove us to offer our customers a new piston ring with zero gap, supplied as a spare part with the MHR TEAM cylinder kits. By modifying the piston ring gap, a perfect fit can be achieved for any cylinder selection, thus ensuring the best performance. It is necessary to properly fit the piston ring to the cylinder bore. Please note : the absence of this modification will cause failure of the cylinder kit, thus forfeiting any warranty. This piston ring must be fitted by a qualified technician. Please pay special attention to the workmanship!!!