aFe 48-46206 Twisted Steel Header for Jeep (Non-CARB Compliant) Dyno tests resulted in an added 9 horsepower and 10 lb. x ft. of torque, Constructed of 409 stainless steel for strength and durability, Uses a heavy-duty 1/2" flange to prevent war page and insure a leak-free seal A formed 4-to-1 collector decreases turbulence and increases exhaust velocity, Optimized tube lengths improve flow and performance, All necessary hardware included 1-1/2" 14-gauge CNC mandrel-bent tubing for increased flow, increasing horse power and torque, The header uses all factory mounting locations for a hassle-free installation Fits: 84-01 Jeep Cherokee (XJ), 83 Jeep CJ-5, 83-86 Jeep CJ-7, 83-85 Jeep CJ-8, 87-95 Jeep Wrangler (YJ), 97-02 Jeep Wrangler (TJ) Manufactured and assembled in the USA