A rear axle exhaust is common on low-riding vehicles with mufflers located near the rear, using a short tailpipe to eliminate ground clearance issues. Aftermarket systems improve performance, reduce noise, and offer better quality with mandrel bends and lifetime warranties.
A rear axle exhaust is common on late model vehicles that have a low ride height and low ground clearance. These vehicles typically have the muffler located near the rear of the vehicle, often using the muffler outlet as an exhaust tip or tailpipe, even if very short. Attached to the catalytic converters on these vehicles are long, straight exhaust pipes that run under the vehicle’s floorboards, tucked into the vehicle’s chassis, to eliminate ground clearance issues. Axle rear exhaust commonly attaches to this straight tube at, or slightly behind, the vehicle’s rear axle. The axle rear exhaust system typically consists of a short radius bend pipe that connects to the muffler and a short tailpipe.
Often factory mufflers and exhaust systems are very restrictive. This causes the engine to produce less horsepower as exhaust gases are forced to fight through the restrictive exhaust system to exit the engine. By putting a less restrictive aftermarket axle post exhaust system on a vehicle, the engine often runs cooler and more power is produced. Another key factor in the decision to install the axle rear exhaust is the noticeable exhaust noise that the system produces. A quality rear axle exhaust can’t just add increased performance – systems typically include polished chrome or stainless steel exhaust tips to add visual appeal to the vehicle.
A wide variety of axle rear exhaust systems are very easy to use, allowing the vehicle owner to complete the installation in a driveway in a matter of a few hours. System quality is often much better than the vehicle’s original equipment package. Aftermarket systems often use mandrel bends to create a much smoother flow of gases, as well as improve and increase product life by limiting the areas where rust can form on smooth bends. Original equipment pipes are typically bent with large pinches and kinks that collect salt and debris, creating rust-prone areas.
Many manufacturers of rear axle exhaust systems offer lifetime warranties on their products. An anti-seize compound should be placed on the pipes where the original exhaust and aftermarket units overlap to prevent rust and corrosion from forming between the two dissimilar metals. Many manufacturers of axle support systems also recommend the use of only stainless mounting hardware.
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