MUFFLER ASSEMBLY EARLY ROUND
Exhaust Muffler Early Round Type
For early production MB and GPW
Round exhaust muffler as used on early production Willys MB and Ford GPW jeeps until approximately April-May 1942. This early version features a characteristic cylindrical shape and produces a different, more authentic sound than the later oval muffler. Reproduction manufactured to original specifications.
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Type Round (cylindrical) |
Application Early production WWII jeeps |
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Finish Olive Drab |
Part number WO-A-1146 |
Features
- Exact reproduction of early WWII type
- Round cylindrical shape as original
- Glasspack construction with sound damping
- Characteristic sound, different from oval muffler
- Complete with connections
★ Manufactured according to original blueprints for correct fitment and authenticity. Suitable for restorations of early production vehicles.
Application
Used on Willys MB and Ford GPW from start of production until approximately April-May 1942 (MB serial numbers up to approximately 134000-160000). From mid-1942, the round muffler was replaced by the oval version. Suitable for authentic restorations of early slat grille and early script jeeps.
Installation notes
Uses the same mounting points on the body as the oval muffler. Requires special round clamps (instead of oval clamps). Front mounting via carriage bolt through front floor cover; rear mounting via bracket with pressed-in nut. Rubber mounting straps are identical to oval system.
Compatibility
Specific for early MB/GPW production until mid-1942. NOT compatible with late production jeeps that originally came with oval muffler. CJ-2A and later civilian models used a different version. Note: this system sounds different and becomes progressively louder due to burning out of the filling (glasspack principle).
Historical context
The round muffler was the first exhaust muffler used on the earliest Willys MB and Ford GPW jeeps in 1941-early 1942. From April-May 1942, it was replaced by the oval version which was produced until the end of the war.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
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This part is intended for the restoration of historic military vehicles. Fitting, aligning, deburring or reworking is part of that work and is inherent to the nature of these goods. Dimensional variation also exists between original vehicles.
Installation requires technical knowledge of the vehicle. Unsure whether this part suits your version? Ask us before purchase at info@willys.be.
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Ford GPW (early) | 1942 |
📐 Diagrams & technical drawings
From the original Technical Manual TM 10-1513 — Maintenance Manual — only for Willys MB / Ford GPW (1942)
