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WalkerPart #: 40412
Walker 40412 Exhaust Y Pipe
63 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Chevrolet and GMC, K10, K1500, K20, and K2500
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Not what you need? See all Exhaust Y Pipe options
Walker 40412 Exhaust Y Pipe for Chevrolet and GMC
Walker 40412 is a specific-fit exhaust Y pipe built from aluminized steel for corrosion resistance and long-term durability. It is engineered for direct replacement on select Chevrolet K10, K20, GMC K1500, and GMC K2500 trucks with the listed exhaust configurations.
- Aluminized steel construction for durable exhaust service
- Specific fit for direct replacement on confirmed applications
- Precision-bent tubing for accurate routing and alignment
- Fixture-checked manufacturing for consistent fitment
- 2.5 in. outlet outside diameter
- 35 in. overall length
- 3-bolt loose flange with spherical flare inlet design
- Single outlet pipe connection
- 0.054 in. pipe wall thickness
Application and fitment details
This Walker exhaust Y pipe, part number 40412, is made for select 1981-1986 Chevrolet and GMC trucks with dual outlets and a single catalytic converter. It also covers 1981 Chevrolet K10 and GMC K1500 models with a California emission system and single outlet. For buyers searching for a Walker 40412 exhaust Y pipe for Chevrolet K10 or GMC K2500 exhaust replacement, this part matches the confirmed vehicle configurations listed below.
- Fits 1981-1986 Chevrolet K10, N/A, with Dual Outlets; with Single Catalytic Converter
- Fits 1981-1986 Chevrolet K20, N/A, with Dual Outlets; with Single Catalytic Converter
- Fits 1981-1986 GMC K1500, N/A, with Dual Outlets; with Single Catalytic Converter
- Fits 1981-1986 GMC K2500, N/A, with Dual Outlets; with Single Catalytic Converter
- Fits 1981 Chevrolet K10, N/A, with California Emission System; with Single Outlet
- Fits 1981 GMC K1500, N/A, with California Emission System; with Single Outlet
What this exhaust Y pipe helps address
- Cracked or rusted exhaust Y pipe sections
- Exhaust leaks at the inlet flange or pipe joints
- Restricted exhaust flow from damaged tubing
- Fitment issues caused by worn or incorrect replacement pipes
- Noise from deteriorated exhaust connections
Installation notes and quality assurance
Use the vehicle’s exhaust configuration to confirm application before installation. The 3-bolt loose flange with spherical flare inlet and pipe connection outlet are key fitment points, and the specific-fit design supports direct replacement on the listed Chevrolet and GMC trucks. Walker manufactures this pipe with precision benders and fixture checks to help maintain consistent dimensions and fit.
This part cross-references Monroe Shocks & Struts (e.g., 94904) for the same application.
Quality assurance
Walker builds this exhaust Y pipe from aluminized steel and checks it during manufacturing for fit consistency and installation accuracy.
| Brand | Walker |
|---|---|
| Part Number | 40412 |
| Outlet Outside Diameter | 2.5 |
| Length | 35 |
| Grade Type | Regular |
| Bend Type | Compression |
| Finish | Aluminized |
| Inlet Quantity | 2 |
| Inlet Type | 3 bolt loose flange with spherical flare |
| Material | Steel |
| Mounting Hardware Included | No |
| Outlet Quantity | 1 |
| Outlet Type | Pipe connection |
| Pipe Wall Thickness | 0.054 |
| Universal Or Specific Fit | Specific |
This part fits 63 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Wheel Base | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1986 | Chevrolet | K10 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | Chevrolet | K10 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | Chevrolet | K10 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | Chevrolet | K10 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | Chevrolet | K20 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | GMC | K1500 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | GMC | K1500 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | GMC | K1500 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | GMC | K1500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1986 | GMC | K2500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | Chevrolet | K10 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | Chevrolet | K10 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | Chevrolet | K10 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | Chevrolet | K10 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | Chevrolet | K20 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | Chevrolet | K20 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | GMC | K1500 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | GMC | K1500 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | GMC | K1500 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | GMC | K1500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1985 | GMC | K2500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | Chevrolet | K10 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | Chevrolet | K10 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | Chevrolet | K10 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | Chevrolet | K10 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | Chevrolet | K20 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | GMC | K1500 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | GMC | K1500 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | GMC | K1500 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | GMC | K1500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1984 | GMC | K2500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | Chevrolet | K10 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | Chevrolet | K10 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | Chevrolet | K10 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | Chevrolet | K10 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | Chevrolet | K20 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | GMC | K1500 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | GMC | K1500 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | GMC | K1500 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | GMC | K1500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1983 | GMC | K2500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | Chevrolet | K10 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | Chevrolet | K10 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | Chevrolet | K10 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | Chevrolet | K10 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | Chevrolet | K20 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | GMC | K1500 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | GMC | K1500 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | GMC | K1500 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | GMC | K1500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1982 | GMC | K2500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | Chevrolet | K10 | 5.7L | V8 | 131.5" | N/A | with California Emission System; with Single Outlet |
| 1981 | Chevrolet | K10 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | Chevrolet | K10 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | Chevrolet | K10 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | Chevrolet | K10 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | Chevrolet | K20 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | GMC | K1500 | 5.7L | V8 | 131.5" | N/A | with California Emission System; with Single Outlet |
| 1981 | GMC | K1500 | 5.0L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | GMC | K1500 | 5.7L | V8 | 117.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | GMC | K1500 | 5.0L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | GMC | K1500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
| 1981 | GMC | K2500 | 5.7L | V8 | 131.5" | N/A | with Dual Outlets; with Single Catalytic Converter |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
94904
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.