Exhaust Muffler for 4 X 9in. Oval Straight-Through Performance Exhaust Muffler MagnaFlow 11255
Exhaust Muffler for 4 X 9in. Oval Straight-Through Performance Exhaust Muffler MagnaFlow 11255
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The MagnaFlow 4 X 9in. Oval Straight-Through Performance Exhaust Muffler 11255 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 2.25/2.25in. 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 11255s weight-optimized 4x9x18in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 11255 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.
- Delivers a Smooth, Deep Tone
- Mufflers are Bi-Directional
- 100% Stainless Steel
Key Specifications
- Series: Straight-Through
- Material: Stainless Steel
- Finish: Satin
- Body Shape: Oval
- Inlet Diameter: 2.25 in
- Outlet Diameter: 2.25 in
- Inlet Quantity: 1
- Outlet Quantity: 1
- Inlet Position: Offset
- Outlet Position: Center
- 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.