The purpose of factory exhaust system is to muffle as much sound as possible. With that comes power-robbing backpressure created by restricting exhaust gas flow from the tailpipes.
The three most common types of exhaust systems are:
Cat-back exhaust systems replace exhaust components from the catalytic converter back to your mufflers. These systems typically include new mufflers and tailpipes, but depending on your truck’s make and model, they can also come with a mid-pipe, X-pipe, H-pipe or a Y-pipe.
Cat-back systems, also known as DPF (particulate filter) back on diesel applications, are among the most popular exhaust upgrades for several reasons.
Adding one is a relatively simple modification that provides low-cost power gains, although the exact amount of horsepower depends on the remaining stock exhaust components and catalytic converter design. Better fuel economy is likely. Cat-back systems also sound tough and are usually emissions-legal because they incorporate your truck’s stock catalytic converter.
An axle-back exhaust system includes all the components from the rear axle to exhaust tip. Although cat-back (and header-back) systems can deliver more power gains, there are benefits to opting for an axle-back system, including lower costs and easier installations.
Header-back exhaust systems replace everything from the header collector to the tailpipes. By replacing all exhaust system components, header-back systems allow for larger pipe diameters throughout of your entire system for greater exhaust flow. The downside is that these systems tend to be more expensive and tougher to install than comparable cat-back, DPF-back, or axle-back exhaust systems because you are usually replacing the entire system.
1.Single Exhaust Systems
The single exhaust system is the most common setup. This design uses just one set of exhaust components, including a muffler with an exhaust tip that typically exits behind the axle of the vehicle. Aftermarket single exhaust systems provide performance advantages over stock because of larger-diameter pipes and less-restrictive mandrel bends. These systems are less expensive and weigh less than true dual-rear exhaust systems.
2.Dual Exhaust Systems
Dual exhaust systems are arguably the most popular design. It features two separate pipes running from the headers all the way back to the exhaust tips, along with two catalytic converters (depending on the application and system) and two mufflers with their own exhaust tips.
Many performance enthusiasts prefer the two-muffler look, the distinctive growl, and the high-flow capabilities of two separate exhaust passages for each bank of engine cylinders.
If there’s a disadvantage to a dual exhaust system, it’s the potential for a pressure imbalance between the two sets of exhaust components. Uneven backpressure can cause one bank of engine cylinders to back up and make less horsepower than the other. Dual crossover systems incorporate a special “crossover” pipe to eliminate this problem. Crossover pipes allows exhaust gases to flow freely between two sets of pipe, balancing exhaust flow and eliminating excess backpressure on either side. The dual crossover exhaust system is generally regarded as the best performing exhaust but, in many cases, requires extra modification work to make them fit.
3.Dual-exit exhaust system.
A third option is a dual-exit exhaust system. They use the same configuration as a single exhaust system—one headpipe, converter, and muffler—but have two exhaust tips exiting from the muffler. There is no performance advantage, but many prefer the look of dual tips.