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CSF 2991 Radiator
| Brand | CSF 2991 |
|---|---|
| Box Height (in) | 7 |
| Box Length (in) | 32 |
| Box Weight (lbs) | 10 |
| Box Width (in) | 24 |
| Cap Included | No |
| Core Length | 14 7/8 |
| Core Material | Aluminum |
| Core Thickness | 11/16 |
| Core Width | 28 7/8 |
| Down Flow Or Cross Flow Type | Down Flow |
| Hazardous Material | No |
| Inlet Diameter | 1 1/4 Left |
| Inlet Length (in) | 29 1/2 |
| Inlet Width (in) | 1 9/16 |
| Oil Cooler (in) | 13 3/4 (high-effeciency Concentric Type) |
| Outlet Diameter | 1 1/4 Left |
| Outlet Length (in) | 29 1/2 |
| Outlet Width (in) | 1 9/16 |
| Radiator Core Row Quantity | 1 |
| Tank Material | Plastic |
| Tech Note | O.E.M style plastic tanks & Aluminum core. |
| Product line | 1 Row Plastic Tank Aluminum Core |
| Fits | Mazda · 6 vehicles |
OE-style construction. Plastic tanks and an aluminum core match the original design.
Down-flow design. Promotes efficient coolant movement through the radiator.
Wind tunnel tested. Validated for cooling performance in laboratory testing.
Cross-references APDI 8012673, Hayden 2673 and Spectra Premium CU2673 for the same application. See all 6.
OE-Style Cooling for Mazda 6
This CSF radiator is built for 2003-2008 Mazda 6 applications with an OE-style plastic tank and aluminum core design. It is engineered for direct-fit cooling performance and uses a down-flow layout with left-side inlet and outlet connections.
Key Features
- Fits 2003-2008 Mazda 6, N/A
- CSF Part Number: 2991
- 1-row radiator design with plastic tanks and aluminum core
- Down-flow configuration for factory-style cooling layout
- Core dimensions: 28 7/8 in. wide, 14 7/8 in. long, 11/16 in. thick
- 1 1/4 in. left inlet and 1 1/4 in. left outlet
- Integrated high-efficiency concentric-type oil cooler
- OE-style plastic tanks and aluminum core construction
Product Details
CSF Part Number 2991 is part of the brand’s 1 Row Plastic Tank Aluminum Core line, a product line focused on OE-style radiator construction for factory fitment and thermal control. CSF manufactures radiators to high-performance standards and validates cooling performance through wind tunnel testing. With decades of production experience and a broad catalog of radiator applications, CSF supports a wide range of vehicle platforms, including the Mazda 6.
This radiator is designed for Mazda 6 models from 2003 through 2008 and uses the same general factory-style layout expected in OE replacement cooling systems. The aluminum core helps transfer heat efficiently, while the plastic tanks match the original equipment design for a straightforward replacement. This part cross-references Hayden 2673 and Spectra Premium CU2673 for the same application.
Common Problems This Radiator Helps Address
- Overheating caused by a leaking or restricted radiator
- Coolant loss from cracked or aged plastic tanks
- Reduced heat rejection from a worn or clogged core
- Cooling system performance issues on a Mazda 6 with factory-style plumbing
- Oil cooling concerns where the integrated cooler is part of the original setup
Installation Notes and Tips
Verify inlet and outlet orientation before installation, since this radiator uses left-side connections. Confirm core dimensions and mounting layout against the original unit on your Mazda 6 before removal. Inspect hoses, clamps, and related cooling system components for wear so the replacement radiator can perform as intended.
Quality Assurance
CSF radiators are manufactured in ISO/TSO-certified facilities and are engineered for cooling performance validation. The brand has supplied radiators worldwide for more than 50 years and produces a large range of OE-style and performance cooling components.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2008 | Mazda | 6 | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2007 | Mazda | 6 | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2006 | Mazda | 6 | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2005 | Mazda | 6 | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2004 | Mazda | 6 | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
| 2003 | Mazda | 6 | 2.3L | L4 | N/A | OE style design ensures optimal fitment and performance.; 1 Row Plastic Tank Aluminum Core |
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