MagnaFlow Exhaust, Mufflers & Cat Converters - Quality

MagnaFlow Custom Builder Series Downpipe Back 4 in Performance Exhaust System 18980

MagnaFlow Custom Builder Series Downpipe Back 4 in Performance Exhaust System - Main image
$339 $565 In stock

Category: Performance Exhaust

The MagnaFlow Aluminized Custom Builder Series 18980 i's weight-optimized and engineered to enhance your diesel truck with the dyno-proven performance and powerful, resonant sound that we're famous for. Custom Builder Pipe Kit 18980 features durable, corrosion resistant aluminized steel construction and includes 4in. diameter mandrel bent pipes. Each component is produced using advanced CNC precision robotic manufacturing and backed by MagnaFlow's 1-year limited warranty. This emissions-legal downpipe-back kit utilizes a Clamp-On inlet connection and is designed to produce Aggressive exterior and Moderate interior sound levels with a Single Passenger Side Rear exit. Professional installation is recommended due to possible cutting, welding and fabrication required.

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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)

Penelope R. ★★★★★

The 4-inch piping really wakes up the turbo spool on my Cummins—definitely feels stronger through the mid-range. Install was straightforward, and the deep tone is exactly what I wanted without being obnoxious inside the cab. Well worth the upgrade for the sound and response.

Nicholas ★★★★★

Installed this on my 2019 Ram 2500 and the weight savings over stock were immediately noticeable. The aluminized build feels solid, and the exhaust note is deep without being obnoxious inside the cab.

Stella O. ★★★★★

That resonant, aggressive tone when I step on it totally transformed how my truck drives—way more punch than the stock setup. Installation wasn’t too bad either, took me about an hour with basic tools.