Kenworth W990 Exhaust Parts

Your Kenworth W990 already makes a bold statement. Now it’s time to back that up with an aftermarket exhaust system that boosts your performance and turns heads while you’re at it.
4 State Trucks gives you everything you need to upgrade, replace, or customize your W990 exhaust setup. Whether you’re chasing better airflow, reduced emissions, or a classic chrome-stacked look—this product lineup has your back.

Why Upgrade Your W990 Exhaust System?

Let’s talk benefits: - Improve engine performance: Better exhaust flow = more power and better fuel efficiency. - Upgrade the sound: Dial in that deep, confident Kenworth growl. - Enhance your rig’s look: Chrome stacks, polished tips, and tight-fitting piping give your W990 that show-stopper finish. - Keep it compliant: With reliable mufflers and emission-control parts, you’re ready for the road ahead. What's Available? - Chrome Exhaust Stacks & Tips: For that polished, professional look that stands out. - Mufflers & DPF Systems: Quiet down your ride while meeting EPA requirements. - Exhaust Clamps, Elbows & Mounting Brackets: Keep your system locked in and leak-free. - Full Exhaust Kits: All-in-one setups for easy installs and maximum results.

Achieve the Total Performance & Style Upgrade

Every part is engineered for heavy-duty, commercial-grade use. Whether you’re pulling loads coast-to-coast or running regional hauls, your W990’s exhaust system needs to keep up. While you’re working on the exhaust, you can swap out your W990 AC/heating components. These components are durable, corrosion-resistant, and designed to last mile after mile. Ready to upgrade your Kenworth W990? Shop exhaust parts now and build a system that performs just as hard as you do. Clean look. Strong sound. Maximum power. Let’s go.