Muffler for Cat D8N, D8R, D8R II Dozer & 578, 583R Pipelayer 1649633

Fits Models At A Glance:

Caterpillar Dozers:

• D8N
• D8R
• D8R II

Caterpillar Pipelayers:

• 578
• 583R

Key Notes:

• Part Numbers: 1649633, 164-9633, 2W5932
• Weight: 40.80 lbs (18.51 kg)
• Dimensions: 64.00 cm wide × 28.00 cm deep
• Engine: Fits machines with the Cat 3406 engine family (3406C / 3406E)
• Type: Exhaust muffler
• Condition: Aftermarket replacement part
• Engine & Fitment Notes: This part spans the D8N through D8R II across the 3406C / 3406E engines. The 587R pipelayer is not covered by this number. Confirm your machine's serial and engine before ordering
• Shipping: Additional handling fees apply
• Application: Reduces engine noise and routes exhaust gases away from the machine on the D8N, D8R, and D8R II dozers and the 578 and 583R pipelayers

Common Use Case or Symptoms:
Use when the muffler is rusted through, leaking exhaust, excessively loud, or physically damaged — a failed muffler allows exhaust gases and noise to escape at the machine rather than being routed away safely.

Why Choose Broken Tractor:
✅ Covers Dozers and Pipelayers Alike — one muffler spans the D8N–D8R II dozers and 578/583R pipelayers on the 3406 engine
✅ Practical Replacement for a Discontinued Muffler — the ready-to-install option for these machines
✅ Fast Shipping from a U.S.-Based Team — ready to ship from our U.S. warehouses