Shop for Aftermarket DPF and Muffler Parts for the Sterling L-Series. Keep your Sterling L-Series truck running smoothly and quietly with some awesome diesel particulate filters (DPFs) and mufflers. Whether you're looking to swap out a DPF for engines like Caterpillar or Detroit Diesel, or if you just want to upgrade your muffler for a cooler sound and better performance, you'll find what you need right here. Top Features: High efficient exhaust filtration and noise abatement. Options for different sizes, materials, and configurations. Fits perfectly with Sterling L-Series trucks. Give your truck better performance and a longer life with some top-shelf DPF and muffler components that can dish out whatever the road is dishing out.