This Silencer Kit is a genuine Stihl exhaust assembly for selected walk‐behind lawn mowers, including RM443.3 and RM448.1VC. It is engineered to lower exhaust noise while maintaining smooth engine running and proper exhaust flow. Built with a durable metal body and a hard‐wearing black finish, the unit is designed for long service life in regular mowing conditions. As an OEM part, it aligns with the original mounting points for a precise, leak‐free fit and dependable performance. Ideal for replacing a corroded, cracked or excessively loud muffler, it helps keep your mower compliant in noise‐sensitive areas without compromising cutting performance. OEM No. 6340 007 1026 (MPN 63400071026). Genuine Stihl part.

Key Features:
– Genuine Stihl part for assured compatibility and quality (OEM 6340 007 1026 / MPN 63400071026)
– Reduces exhaust noise for a quieter mowing experience
– Robust metal construction with a protective black finish for durability
– Exact-fit replacement using original mounting points for straightforward installation
– Maintains proper exhaust flow to support reliable engine performance
– Suitable for routine maintenance or restoring performance after muffler damage or corrosion
– Designed for a wide range of Stihl RM and MB series mowers

Typical Applications:
Replacement of worn or noisy mufflers on Stihl pedestrian mowers used in residential gardens, commercial grounds, parks, schools and other noise‐sensitive locations. Useful when the original silencer shows rust, cracks, blown gaskets or increased noise levels, helping to restore quieter operation and dependable service.

Also known as:
Mower muffler, exhaust silencer, exhaust kit, exhaust box, silencer assembly, noise reducer, muffler assembly, exhaust can.

Fits Models:
MB 3.2 RT, MB 545.1, MB 545.1 T, MB 545.1 V, MB 545.1 VE, MB 545.1 VM, MB 545.1 VR, MB3.2 RT, MB3.2RT, MB32RT, MB545.1, MB545.1T, MB545.1V, MB545.1VE, MB545.1VM, MB545.1VR, MB5451, MB5451T, MB5451V, RM 448.1 VC, RM 545.0 T, RM 545.0 VE, RM 545.0 VM, RM 545.0 VR, RM 545.1 T, RM 545.1 VE, RM 545.1 VM, RM 545.1 VR, RM 650.1 VE, RM443.3, RM443.3T, RM443.3V, RM4433, RM4433T, RM4433V, RM448.1VC, RM448.3T, RM448.3V, RM4483T, RM4483V, RM453.3T, RM453.3V, RM4533T, RM4533V, RM545.0T, RM545.0VE, RM545.0VM, RM545.0VR, RM545.1T, RM545.1VE, RM545.1VM, RM545.1VR, RM5450T, RM5451T, RM650.1VE

Alternate Part Numbers:
6340-007-1026, 63400071026

Product Specifications