The Wacker Neuson 12251-ZH9-000 Exhaust Pipe is a genuine OEM component designed for the G25 and G20 series portable generators. As a direct OEM replacement, it is engineered to the same specifications as the original part fitted at the factory, ensuring a correct installation across the wide range of G25 configurations — including skid-mounted, custom, cold-weather, extended run tank, and Tier 4i/T4F variants — as well as compatible G20 mobile generator models. Sourcing the genuine Wacker Neuson 12251-ZH9-000 means you can be confident in fit and material compatibility without guesswork or modification. Keep a verified OEM part on hand to get your generator back in service as quickly as possible.
Key Features
- Genuine OEM Construction — Manufactured to Wacker Neuson's original material and dimensional specifications for the exhaust system, ensuring correct wall thickness, connection diameter, and heat tolerance for the G25 and G20 engine platform.
- Drop-In Installation — Matches the original mounting points and exhaust outlet geometry, so the pipe seats and seals correctly without reworking brackets or connections.
- Broad G25 and G20 Fitment — Confirmed for skid-mounted, custom, cold-weather, extended run tank, T4i, T4F, and 600-volt switchable G25 configurations, plus select G20 mobile generator models.
- Maintains Exhaust Integrity — A properly functioning exhaust pipe routes combustion gases away from the generator enclosure and operator area, supporting clean airflow and sustained output power across extended run cycles.
- Emissions and Safety Compliance — Correct exhaust routing is critical on Tier 4 and Tier 4i certified units; using the genuine OEM pipe helps preserve the emissions compliance of your certified machine configuration.
The exhaust pipe channels hot combustion gases from the engine's exhaust port safely out of the generator enclosure and away from the unit. On portable and skid-mounted generators like the G25 and G20, this component is exposed to continuous high heat and vibration, making material quality and a secure fit critical to long service life. A cracked, corroded, or poorly fitting exhaust pipe can allow exhaust gases to re-enter the enclosure, create heat damage to surrounding components, and compromise the safe operation of the machine.
Part Details
| Part Number | 12251-ZH9-000 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Exhaust Pipe |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generator, Custom | G25 | 5000620346, 5000620344, 5000620345, 5000620642, 5000009466, 5000620004, 5000620640, 5000620709, 5000620641, 5000009368, 5200005557, 5200003991, 5000620931, 5200001316, 5200014461, 5200014460, 5200014462, 5000621005, 5000620706, 5100022834, 5100042507, 5100042510, 5100042512, 5100042509, 5100025836, 5100042508 |
| Mobile Generator | G20 | 5200016628, 5200022625 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
