Steve Turner
Former Editor, 5.0 Mustang & Super Fords
August 29, 2012

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After increasing the flow and boost on the front side of the engine, the '13 GT500 was forcing big power through the stock exhaust. To open things up, Evo chose ARH 1-7/8-inch long-tubes and a 3-inch X-shaped crossover ($1,600) to provide healthy power gains and especially generous extra grunt on the torque side.