# MagnaFlow Muffler Trb SS 4X9 18 2.5/2.5

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
-   Superior Flow Performance

This Part Fits:

Year

Make

Model

Submodel

1988-1993

Chevrolet

C1500

Cheyenne

1988-1992

Chevrolet

C1500

Scottsdale

1988-1993

Chevrolet

C1500

Silverado

1990-1993

Chevrolet

C1500

WT

1988-1993

Chevrolet

C2500

Cheyenne

1988-1992

Chevrolet

C2500

Scottsdale

1988-1993

Chevrolet

C2500

Silverado

1988-1993

Chevrolet

K1500

Cheyenne

1988-1992

Chevrolet

K1500

Scottsdale

1988-1993

Chevrolet

K1500

Silverado

1991

Chevrolet

K1500

Sport

1990-1993

Chevrolet

K1500

WT

1988-1993

Chevrolet

K2500

Cheyenne

1988-1992

Chevrolet

K2500

Scottsdale

1988-1993

Chevrolet

K2500

Silverado

1988-1993

GMC

C1500

Sierra

1988-1993

GMC

C1500

Sierra SLE

1988-1993

GMC

C1500

Sierra SLX

1988-1993

GMC

C2500

Sierra

1988-1993

GMC

C2500

Sierra SLE

1988-1993

GMC

C2500

Sierra SLX

1988-1993

GMC

K1500

Sierra

1988-1993

GMC

K1500

Sierra SLE

1988-1993

GMC

K1500

Sierra SLX

1993

GMC

K1500

Sierra Sport

1988-1993

GMC

K2500

Sierra

1988-1993

GMC

K2500

Sierra SLE

1988-1993

GMC

K2500

Sierra SLX

## Details

- **Price:** 241.41 CAD
- **Vendor:** Magnaflow
- **Type:** Muffler

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 241.41 CAD | In stock |

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/magnaflow-muffler-trb-ss-4x9-18-2-5-2-6)
> Updated: 2026-06-29