Ready to give your big rig a bold upgrade? Our 5-inch semi-truck exhaust stacks aren’t just about style—they're about making a serious statement while improving performance under the hood. Whether you're chasing a classic-looking, polished exhaust stack or you just want to boost airflow and durability, you’re in the right place.

Why Run 5" Exhaust Stacks on Your Semi?

Exhaust stacks move hot gases up and out of the cab area instead of under the trailer. That keeps heat and fumes away from your driveline—and from you. It also frees up space under the chassis, which is especially useful if you're running a custom setup or auxiliary systems.

What Does a Bigger Pipe Size Do for Your Truck?

Stepping up to a 5-inch exhaust stack can help reduce back pressure. That means your engine doesn’t have to work as hard to push exhaust out—so you get improved efficiency, smoother performance, and a deeper, throatier sound that turns heads at every stoplight. It’s the perfect balance of airflow and tone.

4-Inch vs. 5-Inch Exhaust Stacks—What's the Difference?

Great question. A 4-inch stack looks cleaner and more compact—ideal for tighter builds or classic restorations. But if you want bigger visuals, louder sound, and freer flow, 5-inch stacks are where it’s at. They’ve got that oversized, heavy-hauler vibe and can better support modified or high-horsepower engines.

What If the Exhaust Pipe is Too Small?

Simple—your engine chokes. A restricted exhaust can build backpressure that robs power and fuel efficiency. That’s why many owner-operators go with larger stacks and smooth-bend elbows to keep airflow high and resistance low.

What Increases Flow Rate in a Stack?

It’s a combo of things: pipe diameter, smooth mandrel bends, straight-through mufflers (or no muffler at all), and polished inner walls. The smoother and straighter the path, the faster those gases move—and the more power your engine keeps. Find the Perfect Style Option: - Miter Cut: sharp, angled tops with a classic big-rig silhouette. - Curved: directs fumes backward for a cleaner cab experience. - Flat Top: sleek and bold with no fuss. - West Coast Turnout: bends outward to the side for a regional signature look. - Bull Hauler: wide, aggressive, and impossible to miss. - Straight Stack: raw and to the point—just chrome and flow.

Chrome-Polished & Built for the Long Haul

Shop for 5-Inch Exhaust Stack Tops at 4 State Trucks

These stacks are chrome-polished for a sleek-looking exterior that can match your other aftermarket add-ons, from heavy-duty front-bumpers, fenders, and hood trim to blind-mount visors and heat sleeve wraps. Our 5-inch stacks have your back