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Limit the amount of noise your exhaust system makes with an upgraded Peterbilt 389 Glider aftermarket muffler. We carry top-notch mufflers with a huge selection of sizes and styles to ensure you find the perfect muffler. 4 State Trucks has you covered with the perfect aftermarket muffler for your semi truck and budget.

Peterbilt 389 Glider DPF & Mufflers

Upgrade your Peterbilt 389 Glider with premium DPF and muffler solutions from top brands like BESTfit. This product line offers stainless steel DPF replacements, aluminized steel mufflers, and internal muffler inserts for enhanced performance and aesthetics. Whether you need better exhaust flow, quieter operation, or a custom look, you'll find the right parts with various sizes, lengths, and finishes for a perfect fit.