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MagnaFlow and NAPA Auto Parts have teamed up to bring industry-leading exhaust solutions to more drivers, combining superior engineering and long-lasting reliability to keep vehicles performing at their best. This partnership delivers innovation, quality, and durability—backed by a trusted brand and powered by "NAPA KNOW HOW". 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.
| Inlet Size | 2.5 in |
| Inlet Count | Single |
| VMRS Code | 043-003-001 |
| Body Length | 14 in |
| Outlet Diameter Designation | Inside Diameter |
| Body Diameter | 5 in |
| Inlet Diameter | 2.5 in |
| Outlet Connection Type | Weld-On |
| Outlet Count | Dual |
| SDS Required | No |
| Finish | Satin |
| Inlet Configuration | Center |
| Muffler Material | Stainless Steel |
| Reversible | Yes |
| Body Shape | Round |
| Muffler Outlet Diameter Designation | I.D. |
| Outlet Diameter | 2.5 in |
| Overall Length | 20 in |
| Muffler Inlet Diameter Designation | I.D. |
| Weight | 10 lbs |
| Brand | MagnaFlow |
| Body Width | 5 in |
| Body Height | 5 in |
| Outlet Configuration | Center |
| Grade Type | Performance |
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