aFe POWER MACH Force - Xp cat - back exhaust system is constructed of 3 IN mandrel - bent 304 stainless steel tubing for maximum strength and durability. This system is a muffler - less system and produces an aggressive sound. A mitered merge X - pipe is used to balance and evenly distribute exhaust pulses traveling, minimizing exhaust drone and maximizing scavenging. The crossover tube balances distribution of exhaust pulses resulting reduced drone, and improving sound. This system includes factory style exhaust valves which require the remounding of the factory exhaust valve motors. These valves help regulate, direct and control the flow and back - pressure for maximum performance. Utilizing factory style hangers this system is a direct bolt - on system, which requires no cutting or modifications for a hassle - free installation., and is 100 MIG - Welded for race proven strength and durability.