Overview
The MagnaFlow 11256 is a 2.5-inch satin stainless steel muffler with an offset inlet and a centered outlet, built straight through. Lap-joint welds hold the stainless steel case together.
Inside, a perforated stainless core runs straight through and is wrapped in stainless mesh. The muffler is packed with acoustical fiber fill, which MagnaFlow says keeps the tone deep and consistent over the life of the unit. A lifetime warranty is stated.
Key features
- Offset inlet with centered outlet
- 2.5-inch inlet and outlet
- Lap-joint welded stainless steel case
- Perforated straight-through core with stainless mesh wrap
- Acoustical fiber fill packed in the case
- Lifetime warranty
Pre-install checklist
Preparation makes an exhaust swap much easier. Support the car on stands, let the system cool, and loosen the old clamps before pulling the pipe. Take photos of the existing hanger positions so the new muffler can match them when it goes back on.
Start with the pipe connection, since an offset inlet decides how the body will sit. Hand-tighten the clamps first, check that the outlet clears the axle and fuel tank, and then tighten evenly. A straight-line check from the outlet back toward the tailpipe helps prevent a twisted installation.
After a short test drive, look underneath for soot at joints and listen for new rattles. Exhaust work can settle a little after the first heat cycles, so recheck the clamps and hangers once the system has cooled.
- Measure both tube diameters
- Mark the inlet position before cutting
- Gather clamps and hangers before starting
Specifications
| Brand | MagnaFlow Exhaust |
|---|---|
| Part number | 11256 |
| UPC | 841380000606 |
| Muffler type | Straight through |
| Inlet location | Offset |
| Outlet location | Centered |
| Tube size (inlet/outlet) | 2.5 inches / 2.5 inches |
| Material | Stainless steel |
| Finish | Satin |
| Packing | Acoustical fiber fill |
Vehicle fitment
It is universal fit and no vehicle is named. Check how the offset inlet sits against your pipe and confirm the 2.5-inch tube size before ordering.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The offset inlet means the pipe enters from one side, so confirm where the connection falls before the clamps are tightened. Eye protection is worth wearing whenever you cut or weld exhaust pipe.
What’s included
Gather clamps and hangers before you start, since the box contents should be checked against your installation.
