Fits Namura Pistons: NA-10003 for: Honda XR400R 1996-2004, TRX400EX 1999-08, TRX400X 2009-14;Namura uses the best materials matching the ring design to its application;Often overlooked and unglamorous, they are an essential part of an engine's efficiency and durability;The materials used in the manufacturing of piston rings are one of the most critical factors in their performance;Meets or exceeds OEM specification, only use with Namura Pistons

• Namura NA-10003R Standard Piston Ring for TRX 400EX
• 75.45 Millimeter

Namura NA-10003R Standard Piston Ring for TRX 400EXNamura