THE DUKE'S PERFORMANCE COATED POP UP PISTON FITS STIHL MS391 49MM 372 · SRM-261T S/N: S81413001001 -

· SRM-261T S/N: S81413001001 - S81413999999-->Engine

tool or accessory QUALITY MUFFLER SETUP FOR HUSQVARNA 394 AND 395 CHAINSAWS

AND ECHO CHAINSAWS

DOES NOT FIT EARLIER MODEL K760 SAWS

GLASS FIBER REINFORCED

THE DUKE'S PERFORMANCE COATED POP UP PISTON FITS STIHL MS391 49MM 372 · SRM-261T S/N: S81413001001 -THE DUKE'S SAW SALVAGE MOLYBDENUM DISULFIDE COATED PISTON. LESS OVERALL FRICTION AND CYLINDER WALL WEAR. MOLYBDENUM DISULFIDE IS COMMONLY KNOWN AS "MOLY" OR "MOS2." AWESOME QUALITY PISTON WITH THE STIFFER CAST IRON RINGS AND BEST QUALITY PIN CLIPS. The moly coating is seen as a sacrificial lubricant and creates a surface that is slicker than the traditional bare aluminum. What this creates is a lower friction surface overall and as long as the coating