Gibson Chrome Header for 91-99 Jeep Wrangler YJ, TJ & (Grand) Cherokee XJ, ZJ, WJ with 4.0L I-6 Gasoline Engine

This Gibson Performance Chrome Header has been dyno-tuned and engineered to provide more horsepower and torque to your Jeep 4.0L engine. Gains are noticeable at low and mid-range RPM. The smooth flow of the mandrel bent, 14-gauge steel opens up your exhaust. Nickel chrome plated for durability and long life. 3/8" heavy duty laser cut port flanges provide you with a header that does not warp or leak - quite the upgrade over the factory, crack-prone exhaust manifold! Bolt on header, 50-State Legal, and made in the USA! What more can you ask for?