Fits 1991-1999 Jeep 4.0L 1-1/2 Shorty Exhaust Header-Silver-40520 floor-mats-and-carpets 109 mm inlet tube with

109 mm inlet tube with a 99% larger cross sectional area at the airbox

4 V8 1983 - 1984 Chevrolet El Camino 350/5

6 V8 1966 - 1969 Chevrolet Caprice 427/7 V8 1968 - 1969 Chevrolet Caprice 396/6

Simply plug-and-play and press "ON" to open the valves fully

Fits 1991-1999 Jeep 4.0L 1-1/2 Shorty Exhaust Header-Silver-40520 floor-mats-and-carpets 109 mm inlet tube withThis BBK Performance shorty tuned Length exhaust Header is designed and constructed as direct fit replacement for all Jeep 4. 0L applications. Each header is manufactured with 1 1 2 in. CNC mandrel bent tubing that offers unrestricted exhaust flow for increased horsepower and torque over factory OEM manifolds. BBK tuned Length headers offer improved scavenging waves for better combustion, which leads to improved performance and fuel economy over stock