6-inch semi-truck exhaust stacks are popular for adding a bold, eye-catching look to your ride. This collection offers a variety of styles, lengths, and finishes, including flat tops, West Coast turnouts, and long bull hauler designs. These exhaust stacks are built for durability and style and have sturdy construction, corrosion-resistant finishes, and custom-fit options.
Frequently Asked Questions About 6 Inch Semi-Truck Exhaust Stacks
Will these 6-inch stacks fit my truck, and what adapters might I need?
Our 6-inch exhaust stacks are designed to fit most semi-trucks including Peterbilt, Kenworth, Freightliner, Mack, and Volvo models. However, you'll need to check your current exhaust pipe diameter. If you have a 5-inch exhaust system, you'll need a 5-to-6 inch exhaust adapter. Some older models or custom setups may require additional mounting brackets or modifications to the existing exhaust hangers. We recommend measuring your current setup before ordering.
What's the difference between chrome, stainless steel, and powder-coated stacks?
Chrome stacks offer the shiniest mirror finish but require regular polishing to prevent rust and pitting, especially in areas with road salt. Stainless steel stacks are more durable and resistant to corrosion, maintaining their appearance with less maintenance, though they have a slightly less reflective finish. Powder-coated black stacks provide excellent durability and a matte finish that hides soot buildup better, making them ideal for working trucks. Stainless steel typically lasts the longest in harsh conditions.
How difficult is the installation, and what tools do I need?
Installation typically takes 2-4 hours per stack for someone with basic mechanical skills. You'll need standard hand tools, exhaust clamps, and possibly a sawzall if you need to trim existing pipes. The main challenges include aligning the stacks properly, ensuring adequate clearance from the cab and fairings, and securing them tightly enough to prevent vibration. Some installations may require welding for a permanent mount. We strongly recommend using new clamps and hangers during installation for the best results.
How do these stacks affect engine performance and sound?
6-inch stacks generally provide better exhaust flow than smaller diameter stacks, which can slightly improve engine breathing and potentially increase fuel efficiency by 1-2%. The larger diameter typically produces a deeper, less raspy exhaust note compared to 5-inch stacks. However, the sound difference is more noticeable with straight-through designs versus those with baffles or mufflers. Performance gains are minimal but the reduced back pressure can help turbo spool-up slightly.
What length should I choose, and how do I prevent stacks from leaving soot on my trailer?
Stack length depends on your truck configuration and trailer type. For standard sleeper cabs pulling van trailers, 48-60 inch stacks usually provide adequate clearance. Flatbed operators often prefer 36-48 inch stacks. To minimize soot on your trailer, ensure the stack tops are at least 12 inches above your trailer height and consider curved or angled tops that direct exhaust away from the trailer. Straight-cut stacks tend to deposit more soot on trailers than angle-cut or curved designs.
