Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Round Ports, 2.15 Inch Exhaust Upgrades and Parts " Part Number: 0986435621-R5

Part Number: 0986435621-R5

2018 Ram 1500 Express Gas Crew Cab Pickup

No cutting or drilling is Required to install

Adjust Idle Up feature for 600-1800rpms

This Causes Dreaded Thermal Runaway

Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Round Ports, 2.15 Inch Exhaust Upgrades and Parts " Part Number: 0986435621-R5Manufactured from high temperature steel core graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities. High recovery material allows header or manifold flange to stay sealed if flange loses clamp load. Can be