/live/media/RB/RB_674294_Ang.jpg)
OE Quality
60-Day Returns
/live/media/RB/RB_674294_Ang.jpg)
/live/media/RB/RB_674294_Top.jpg)
/live/media/RB/RB_674294_Bac.jpg)
/live/media/RB/RB_674294_Zz3.jpg)
/live/media/RB/RB_674294_Zz4.jpg)
/live/media/RB/RB_674294_Zz5.jpg)
DormanPart #: 674-294
Dorman 674-294 Catalytic Converter with Integrated Exhaust Manifold
⚙️ 4 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$816.01Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Hummer, H3 and H3T
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Dorman 674-294 Catalytic Converter with Integrated Exhaust Manifold
| Brand | Dorman |
| Part Number | 674-294 |
| Color | Natural |
| Finish | Natural |
| Type | One-piece |
| Tube Wall Thickness | 0.125 |
| Grade Type | Regular |
| Converter Body Length | 8 |
| Inlet Type | Flanged |
| Outlet Type | Flanged |
| Inlet Quantity | 5 |
| Outlet Quantity | 1 |
| California Air Resources Board (CARB) Certified | No |
| Substrate Material | Ceramic |
| Inlet Mounting Hole Quantity | 9 |
| Inlet Gasket Included | Yes |
| Inlet Mounting Hardware Included | Yes |
| Outlet Mounting Hole Quantity | 4 |
| Outlet Mounting Hole Quantity | 9 |
| Outlet Gasket Included | Yes |
| Outlet Mounting Hardware Included | Yes |
| Overall Length | 21 |
| Air Tube Count | 0 |
| Sensor Port Count | 2 |
| Converter Body Material | Ceramic |
| Converter Body Material | Stainless steel |
| CARB Executive Order Number | Not carb compliant |
| New York Certified | No |
| Outlet Port Shape | Round |
| Inlet Port Shape | Rectangle |
| CARB Compliant | No |
| Exhaust Manifold Inlet Port Shape | Rectangle |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | Hummer | H3 | 3.7L | L5 | N/A | CARB Compliant: No; CARB Compliant: No |
| 2010 | Hummer | H3T | 3.7L | L5 | N/A | CARB Compliant: No; CARB Compliant: No |
| 2009 | Hummer | H3 | 3.7L | L5 | N/A | CARB Compliant: No; CARB Compliant: No |
| 2009 | Hummer | H3T | 3.7L | L5 | N/A | CARB Compliant: No; CARB Compliant: No |
* 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:
12619749
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.