Single Or Dual Exhaust?
A. Typically, a vehicle with single exhaust has one muffler and a vehicle with dual exhaust has two. But there’s an exception to every rule. Sometimes, space considerations under a vehicle–typically a pickup truck or SUV–force automakers to run dual exhaust through a single muffler. That’s why some mufflers are available with dual inlets. If you have single exhaust on your vehicle but prefer the look of dual exhaust, you can swap on a muffler with dual outlets. Just be sure there’s enough room for two tailpipes. For instance, on trucks, you need to watch out for interference with your spare tire, hitch and bumper or roll pan.
