Description
Straight Through
The MagnaFlow 5in. Round Straight-Through Performance Exhaust Muffler 12866 brings our world-famous exhaust sound and dyno-proven performance to your ride in a weight-optimized 5x5x14in. package with a premium satin finish. The straight-through free-flowing design of this round-bodied muffler's reversible, universal 2.5/2.5in. diameter inlet/outlet layout enables versatile installation options to match the spacing requirements of your vehicle. Due to the cutting and welding involved, professional installation is highly recommended. Internally, 12866 utilizes a perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill to achieve a powerful, resonant tone. This muffler is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty.
Additional Information
Magnaflow Straight-Through Performance Muffler; 2.5in. Center/Center; 5x14x5 Body
Part Type
Exhaust Muffler
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 05:04:48
Features
- 100 Percent Stainless Steel
- 100% Stainless Steel
- Delivers A Smooth-Deep Tone
- Delivers a Smooth, Deep Tone
- Mufflers Are Bi-Directional
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Product Details
| Body Diameter: | 5 x 5 |
| Body Finish: | Satin |
| Body Height: | 5.000 in. |
| Body Length: | 14.000 in. |
| Body Material: | Stainless |
| Body Shape: | Round |
| Body Width: | 5.000 in. |
| Core Diameter: | 2.5 |
| Core Size: | 2.5 |
| Description: | Straight-Through Performance Muffler; 2.5in. Center/Center; 5x14x5 Body |
| Finish: | Satin |
| Hanger Included: | No |
| Inlet Connection Type: | Pipe |
| Inlet Diameter: | 2.5 |
| Inlet Inside Diameter: | 2.500 in. |
| Inlet Outside Diameter: | 2.500 in. |
| Inlet Position: | Front |
| Inlet Quantity: | 1 |
| Inlet Type: | Center |
| Main Piping Diameter: | 2.500 in. |
| Material: | Stainless |
| Muffler Body Diameter: | 5.000 in. x 5.000 in. |
| Muffler Configuration: | Center/Center |
| Muffler Count: | 1 |
| Muffler Overall Length: | 20.000 in. |
| Muffler Type: | Straight-Through |
| Note: | Acoustical Packing |
| Outlet Diameter: | 2.5 |
| Outlet Inside Diameter: | 2.500 in. |
| Outlet Outside Diameter: | 2.500 in. |
| Outlet Position: | Rear |
| Outlet Quantity: | 1 |
| Outlet Type: | Center |
| Overall Length: | 20 |
| Part Number: | mag12866 |
| Removable Core: | No |
| Reversible: | Yes |
| Series: | Straight-Through |
| Shape: | Round |
| Subtitle: | Performance Muffler |
| Subtitles: | Center/Center |
| Tip Quantity: | 0 |
| Title: | MagnaFlow 5in. Round Straight-Through Performance Exhaust Muffler 12866 |
| Type: | Straight-Through |
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Magnaflow, MagnaFlow Exhaust Products, MAGNAFLOW PERF EXHAUST, Magnaflow Performance |
| StreetFX SKU | mag12866 |
| SFX Item ID | 4286098 |
| Accounting SKU | mag-12866 |
| Manufacturer SKU | 12866 |
| Manufacturer UPC | 841380024176 |
| Alternative References | 12866, MFL12866, MPE-12866 |
Muffler, 2.50 in. Inlet/2.50 in. Outlet, 5 in. Round Case, 20 in Long Overall, Satin Stainless Steel, Each
MagnaFlow performance mufflers are designed to provide your vehicle with more power and excellent sound. These exhaust units are available in several styles, and most feature a large-diameter, perforated stainless steel core with a straight-through design—for unrestricted flow and sound control. All contact points are lap-jointed and welded to avoid distortion or cracking at the seams. The mufflers are available in a variety of inlet/outlet diameters, inlet quantities, shapes, and finishes. Order the model that best suits your vehicle application.
| Product Attributes | |
|---|---|
| Brand | MagnaFlow |
| Manufacturer's Part Number | 12866 |
| Part Type | Mufflers |
| Product Line | MagnaFlow Performance Mufflers |
| UPC | 841380024176 |
| Muffler Material | 409 stainless steel |
| Inlet Diameter (in.) | 2.50 in. |
| Outlet Diameter (in.) | 2.50 in. |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| Internal Construction | Perforated stainless tube with packing |
| Inlet Location | Center |
| Outlet Location | Center |
| Case Shape | Round |
| Reversible | Yes |
| Muffler Finish | Natural |
| Case Exterior Length (in.) | 14.00 in. |
| Case Outside Diameter (in.) | 5.00 in. |
| Overall Length (in.) | 20.00 in. |
| Outlet Style | Standard, without tip |
| Remanufactured | No |
| Quantity | Sold individually. |
| Manufacturer Attributes | |
|---|---|
| Exhaust Tip Quantity | 0 |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| Body Length | 14 |
| Inlet Inside Diameter | 2.5 |
| Outlet Inside Diameter | 2.5 |
| Core Diameter | 2.5 |
| Overall Length | 20 |
| Body Height | 5 |
| Body Width | 5 |
| Inlet Type | Center |
| Outlet Type | Center |
| Hanger Included | No |
| Shape | Round |
| Finish | Satin |
| Body Material | Stainless Steel |
| Muffler Type | Straight-Through |
| Reversible | Yes |
| Series | Straight-Through |
| Title | MagnaFlow 5in. Round Straight-Through Performance Exhaust Muffler 12866 |
| Manufacturer Designation | Straight-Through Performance Muffler; 2.5in. Center/Center; 5x14x5 Body |
| Product Class | Exhaust Muffler |
| Construction/Type | Magnaflow Straight-Through Performance Muffler; 2.5in. Center/Center; 5x14x5 Body |
| Product Outline | Delivers a Smooth, Deep Tone Mufflers are Bi-Directional 100% Stainless Steel |
| Vehicle Brief | Exhaust Muffler |
| Market Description | The MagnaFlow 5in. Round Straight-Through Performance Exhaust Muffler 12866 brings our world-famous exhaust sound and dyno-proven performance to your ride in a weight-optimized 5x5x14in. package with a premium satin finish. The straight-through free-flowing design of this round-bodied muffler's reversible, universal 2.5/2.5in. diameter inlet/outlet layout enables versatile installation options to match the spacing requirements of your vehicle. Due to the cutting and welding involved, professional installation is highly recommended. Internally, 12866 utilizes a perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill to achieve a powerful, resonant tone. This muffler is made of durable, corrosion resistant stainless steel and produced using cutting-edge CNC precision robotic manufacturing techniques, all backed by MagnaFlow's limited lifetime construction warranty. |
Brochures
Compatibility
Loading compatibility information...
Keep shopping
More from Magnaflow
