The MagnaFlow 4 X 9in. Oval Straight-Through Performance Exhaust Muffler 11366 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 2.5/2.5in. 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 11366s weight-optimized 4x9x11in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 11366 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.

Features

Signature MagnaFlow Sound

The 4″ x 9″ Oval body of muffler 11366 is engineered to deliver the deep, resonating sound that MagnaFlow mufflers are famous for.

Dyno-Proven Performance

Extensive dyno testing is used to ensure that this 4″ x 9″ Oval muffler increases engine power and performance by improving the flow dynamics and evacuation of exhaust gases.

Optimal Architecture & Construction

The internal architecture of this muffler features a straight-through perforated core with two-stage acoustic packing which maintains the velocity of exhaust flow while generating a smooth, deep exhaust tone. Proudly made in the USA.

Universal Fitment

11366’s universal design enables custom muffler placement and orientation to meet the particular spacing and mechanical requirements of your vehicle. Professional installation is highly recommended.