4.7L V8 Exhaust Header

The Hurricane Headers HU345STM is specifically engineered as an aftermarket upgrade for the Jeep Grand Cherokee WJ equipped with the 4.7L V8 PowerTech engine, covering model years 1999 through 2004. This 4-1 design header serves as a practical replacement for restrictive factory exhaust manifolds, promoting more efficient engine breathing and thereby improving torque, throttle response, and overall exhaust flow. It is an ideal component for street-driven 4WDs, restoration projects, or for owners seeking a more robust and efficient exhaust system. The headers are finished with a durable heat-resistant paint rated up to 800°C, with an optional ceramic coating available for enhanced heat management and durability. Thick, machined flanges are incorporated to ensure improved sealing and durability, while smooth merge collectors contribute to better exhaust gas scavenging and power delivery. Installation notes indicate that oxygen sensor fittings are not supplied or fitted, and aftermarket replacement catalytic converters are required to complete the installation. Some modifications may be necessary, and users should verify emissions and registration compliance in their respective states. Clearance can vary depending on existing engine mounts, steering components, and other aftermarket parts, making trial fitting before final installation recommended. It is the buyer's responsibility to verify compatibility, as the seller is not responsible for orders with mismatched or incompatible products.