Gibson GP400S-C Ceramic Coated Header for 91-99 Jeep Wrangler YJ, TJ & (Grand) Cherokee XJ, ZJ, WJ with 4.0L I-6 Gasoline Engine

Unleash Your Vehicle's Full Power Potential! Every Gibson Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engine's ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock crossover pipe. They are well suited for lowered and raised vehicles, street and off-road. 50 State Street legal. Meets EPA and CARB requirements. Will not affect the factory warranty.