4385675 4443305 MUFFLER with clamp, 2pk u bolts FITS HITACHI EXCAVATOR EX300-5 EX330-5 EX350-5 EX370-5 EX345 6SD1, AFTERMARKET REPLACEMENT PARTS. MOTTROL USA EXCAVATOR PARTS DEPOT. YOUR BEST SOURCE FOR OEM QUALITY EXCAVATOR PARTS. For the parts described with both part number and application machine model or engine model, please make sure to order according to the part number, the application machine model or engine model is just for reference.