Exhaust Muffler for XL 4 X 9in. Oval Multi-Chamber Performance Exhaust Muffler MagnaFlow 13266
Exhaust Muffler for XL 4 X 9in. Oval Multi-Chamber Performance Exhaust Muffler MagnaFlow 13266
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The MagnaFlow XL 4 X 9in. Oval Multi-Chamber Performance Exhaust Muffler 13266 features a straight-through, weight-optimized reversible design with a perforated stainless steel core featuring baffles and tuning gates, enabling it to deliver the powerful signature sound and dyno-proven performance that's made MagnaFlow a household name. Muffler 13266's oval-shaped, 4x9x18in. body and universal 2.5/2.5in. diameter inlet/outlet layout enables flexible installation options to match the spacing requirements of your vehicle. Professional installation is highly recommended. 13266 is produced using advanced CNC precision robotic manufacturing techniques and features durable, corrosion resistant stainless-steel construction, all backed by MagnaFlow's limited lifetime warranty.
- Durable corrosion-resistant stainless steel construction
- CNC precision robotic manufacturing techniques
- Superior flow & performance
Key Specifications
- Series: XL
- Material: Stainless Steel
- Finish: Satin
- Body Shape: Oval
- Inlet Diameter: 2.5 in
- Outlet Diameter: 2.5 in
- Inlet Quantity: 1
- Outlet Quantity: 1
- Inlet Position: Offset
- Outlet Position: Offset
- Body Dimensions: 4 in x 18 in x 9 in
- Overall Length: 24 in
- Fitment Style: Universal
Why Buy This MagnaFlow Part?
Built for exhaust-system performance, durability, and dependable fitment, this part is well suited for replacement, repair, or custom fabrication projects.
Important Installation & Fitment Notes
- This listing is marked universal fitment; please verify all dimensions and connection style before purchase.
- Please confirm pipe diameter, body size, overall length, and inlet/outlet configuration before purchase.
- Professional installation is recommended for best fitment, alignment, and leak-free performance.

Policies and FAQs
Return Policy
Fault reasons include but are not limited to:
- Buyer was shipped the wrong product
- Buyer was shipped a damaged product
- The product page had incorrect fitment and the part does not fit the Buyer's vehicle
Opened boxes, plastic bags, and other packaging are not considered damage (excluding single use items such as, but not limited to, liquids, software, and other components that cannot be reused/resealed).
FAQs
|Q. What is an Intermediate Brake Line?
|A. This is the line that runs from the front of the vehicle to the rear. On most vehicles it connects to a junction then you will have rear axle lines. On a few cars the intermediate lines will connect to the rear wheels. It is recommended to change the axle lines if you are replacing the intermediate lines.
|Q. What is included in a pre bent brake line kit?
|A. Our kits include all of the solid metal lines for that section of the vehicle
|Q. I need to return something - what's your return policy?
|A. We are happy to help! Please help us to help you by going to our return form and filling out the form as best as you can in order to request a return.
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Modern Day stands by our parts and is happy to accept returns within 30 days of purchase. Parts must be in new condition.
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If a part arrives damaged, or is defective, Please report it to us immediately. So we can handle it for your promptly.