Exhaust› Mufflers and Resonators
Magnaflow
MagnaFlow 5 X 11in. Oval Straight-Through Performance Exhaust Muffler 12587
SKU: M001 12587
Moderate — 2–4 hours
Description
Part #: 12587
The MagnaFlow 5 X 11in. Oval Straight-Through Performance Exhaust Muffler 12587 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno-proven performance thanks to its free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill. The reversible, universal 3.5/2.5in. diameter inlet/outlet Straight-Through layout allows you to install it in whatever orientation and configuration you see fit. However, professional installation is highly recommended. Muffler 12587s weight-optimized 5x11x22in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 12587 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.
Features:
- Delivers a Smooth, Deep Tone
- Mufflers are Bi-Directional
- 100% Stainless Steel
Magnaflow Straight-Through Performance Muffler | 3.5/2.5in. Center/Dual | 5x22x11 Body
MIA's Description
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Magnaflow |
| Part Number | M001 12587 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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