Overview
The MagnaFlow Satin Stainless Steel Muffler, part number 12588, is a straight-through oval muffler with dual 2.5 inch inlets and a centered 3 inch outlet, made of stainless steel and 22 inches long.
MagnaFlow Performance mufflers are built from 100% stainless steel and lap-joint welded for solid construction. They use a free-flowing, straight-through perforated stainless steel core, stainless mesh wrap and acoustical fiber fill for a smooth, deep tone. The muffler carries a lifetime warranty.
Key features
- Straight-through design with a perforated stainless steel core
- Two inlets of 2.5 inches and one centered 3 inch outlet
- Stainless steel construction, lap-joint welded
- Stainless mesh wrap and acoustical fiber fill for a deep tone
- Oval shape, 22 inches long
- Satin finish
- Lifetime warranty, per MagnaFlow
Choosing and fitting a muffler
A muffler sits near the rear of the exhaust and quiets engine pulses while keeping the gas path open. A straight-through design keeps the flow direct, which is why many owners choose this style when they want a deeper note. A louder exhaust can still draw attention from local noise rules, so check the rules where you drive before choosing a tone.
Before buying, match the muffler to the pipes already on the vehicle. Inlet and outlet diameters, inlet layout, body length and hanger positions all have to line up with the existing system, or the fit will need cutting and rewelding. Stainless steel handles road salt and moisture well, but clamps and welds still need periodic inspection.
- Inlet layout and tubing diameter
- Hanger positions and clearance from the fuel tank and axle
- Tailpipe angle and bumper clearance
- Gaskets and clamps, usually replaced during a muffler swap
- Heat shield clearance near the floor
Specifications
| Brand | MagnaFlow Exhaust |
|---|---|
| Part number | 12588 |
| UPC | 841380001191 |
| Product type | Muffler |
| Muffler type | Straight through |
| Material | Stainless steel |
| Inlet tube size | 2.5 in. |
| Outlet tube size | 3 in. |
| Inlet location | Dual (dual offset) |
| Number of inlets | 2 |
| Outlet location | Centered |
| Number of outlets | 1 |
| Muffler length | 22 in. |
| Muffler shape | Oval |
| Warranty (per manufacturer) | Lifetime warranty |
| Fitment type | It is a universal-fit muffler. |
Measure the space available for your exhaust system before ordering.
Vehicle fitment
Check that your exhaust layout suits dual 2.5 inch inlets, a single centered 3 inch outlet and a 22 inch length. Confirm fit for your vehicle’s year, model and trim before ordering.
Compare part number 12588 with your vehicle’s year, model, trim, engine and drivetrain before ordering so you receive the correct part.
Confirm inlet and outlet sizes and available space for your exhaust system before installation.
Installation notes
- Follow the installation steps carefully and torque every fastener to the specification for your vehicle.
- Check that all hardware is still tight after the first miles of driving.
- Read all instructions before starting, and support the vehicle on jack stands rated for its weight rather than on a jack alone.
- Wear eye protection and gloves, and replace any worn, damaged or corroded fasteners.
What’s included
One muffler. Check the package contents against your installation before starting, including any clamps or pipes you need.
