aFe POWER introduces the Apollo GT Series cat-back dual rear exit exhaust system for the 2009-2018 Chevrolet Silverado/GMC Sierra 1500 with V6-4.3L & V8-4.8L/5.3L engine. This dual exhaust system is constructed out of 3" 100% MIG-welded, mandrel-bent, stainless steel tubing for maximum flow. The smooth transition bends allow for low turbulence, increasing horsepower, torque and improved throttle response. A free-flow single-in dual out muffler is included which improves performance across the power band while maintaining an awesome sound. In testing, the cat-back exhaust system resulted in gains up to + 14 horsepower and + 17 lbs. x ft. of torque, as measured on our in-house dyno (tested on 2014 Chevrolet Silverado V8-5.3L). Finishing off this exhaust are dual 4-1/2" diameter polished tips. The tips comes with a laser-cut aFe POWERbadge riveted on for an aggressive style.

Features:

• Increases horsepower and torque
• Improves performance
• Lowers exhaust gas temperature
• Flow bench and dyno tested
• Welded hangers with swaged ends
• Slotted and swedged ends
• Premium quality band clamps
• Backed by a 2-year limited warranty
• Proudly made in the USA

A performance exhaust system is one of the most common ways of improving a vehicle's operation. The theory is simple; just reduce restriction to increase exhaust flow and you gain power. But all exhaust systems are not created equal; in reality there's more to it than just selling some sewer pipe sized tubes.

aFe tests its systems on the flow bench and the dynamometer to determine the right pipe size and muffler construction. Then they mandrel bend the pipes to ensure they maintain their shape and size throughout the entire length, to provide smooth, unrestricted airflow. Tubes that are not mandrel bent can lose up to 20% of their diameter in sharp bends. Some systems also include a straight muffler delete pipe if a more aggressive sound and maximum flow is desired. A typical aFe system will increase exhaust flow by up to 29% and lower EGT (Exhaust Gas Temperature) by up to 100º, with a corresponding improvement in power and performance.

But performance is only part of the equation. A quality exhaust system should be easy to install and made to last. The muffler and all pipes of the Apollo GT system are constructed from durable 409 stainless steel. To ensure a tight seal, slotted and swedged ends are used whenever possible. When used with the supplied premium quality band clamps, the tightest, leak-free seal is the result. Every hanger is thoroughly welded on each side to ensure a strong attachment and the hangers also feature swaged bayonet ends to lock in place once installed.

DETAILS:

• Up to +14 HP and +17 lbs. x ft. TQ (tested on 2014 Chevrolet Silverado V8-5.3L)
• Constructed out of 3" mandrel-bent stainless steel tubing
• Utilizes a high-flowing stainless steel single-in dual out muffler
• Uses bayonet style hangers and heavy-duty band clamps for a secure fit
• Comes complete with all necessary hardware for a hassle-free installation
• Includes dual 4-1/2" dia. polished, stainless steel, side-exit tips with laser-cut aFe POWER badges for an aggressive style