Jeep Cherokee Wrangler 4.0 1-1/2 Shorty Exhaust Header Polished Silver Ceramic 91-99 PART #40520 FEATURES: Significant Horsepower and Torque Increase Over Stock 1-1/2" Primaries for Maximum Low End Torque 16 Gauge CNC Mandrel Bent Steel Tubing and 3/8" Thick Flanges Direct Bolt-On for Easy Installation Gaskets and Collector Hardware Included Gasket designed to replace exhaust manifold only without removing the intake. Just remove the manifold cut away the old exhaust gasket and install. Polished Silver Ceramic Finish VEHICLE FITMENT: 1991-1999 Jeep Cherokee 4.0L 2WD/4WD 1993-1999 Jeep Grand Cherokee 4.0L 2WD/4WD 1991-1999 Jeep Wrangler 4.0L 2WD/4WD Increased Horsepower and Torque Improve the power and sound from your 1991-1999 Jeep 4.0L with these ceramic coated BBK Performance shorty headers. BBK Performance Jeep shorty headers will increase your exhaust flow giving you additional horsepower and torque. BBK shorty headers will give your 4.0L Jeep a throaty exhaust note. The durable ceramic coated finish holds in heat, reducing under hood temperatures and increasing power. Top Quality Construction BBK Jeep shorty headers are made from 1-1/2" CNC-machined mandrel bent tubing with 3/8" thick laser cut flanges. The large diameter primary tube design creates unrestricted airflow for ultimate horsepower gains. Not only will these headers flow better than stock, they help address the poor scavenging performance that the factory cast iron manifolds are notorious for. These headers are pressure tested to ensure leak free performance. Installation These Jeep 4.0L shorty headers are designed as a direct bolt on for easy installation on your Wrangler, Cherokee or Grand Cherokee. For use with factory or any aftermarket catback exhaust. Kit includes new gaskets and all required hardware. Emissions Information This part is NOT C.A.R.B Approved and cannot be installed for use on any emission controlled vehicle in California. It cannot be sold or shipped to any California resident or addressee.