MagnaFlow Exhaust, Mufflers & Cat Converters - Quality

MagnaFlow 4 in. x 9 in. x 11 in. Oval Straight-Through Performance Exhaust Muffler Dual/Dual

MagnaFlow 4 in. x 9 in. x 11 in. Oval Straight-Through Performance Exhaust - Main image
$102 $170 In stock

Category: Performance Exhaust

The MagnaFlow 4 X 9in. Oval Straight-Through Performance Exhaust Muffler 11378 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 11378s weight-optimized 4x9x11in. oval-shaped body features a satin finish that elevates the overall aesthetics of your current exhaust setup. 11378 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.

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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Eli W. ★★★★★

The 4x9 oval body fit perfectly into my stock exhaust tunnel without any modifications. Installed it last weekend and the deep, mellow tone at idle is exactly what I was hoping for.

William ★★★★★

I was worried the straight-through design would be too loud, but the signature exhaust tone is deep and aggressive without being obnoxious. The oval 4x9 inch profile fits perfectly in the limited space under my truck.

Brian S. ★★★★★

The oval shape made installation a breeze in my tight underbody space, and the deep tone at idle is exactly what I was after. It’s got that classic straight-through bark without being obnoxious on the highway.