Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Round Ports, 2.15 Inch Exhaust Upgrades and Parts " Up the ante in performance

Up the ante in performance with your Chevy Silverado and GMC Sierra 1500 truck by installing the BDS 4-inch lift kit suspension featuring FOX 2

Adjust Idle Up feature for 600-1800rpms

and passing become effortless

5-inch fabricated rear blocks are stronger and longer-lasting than traditional cast versions

This Causes Dreaded Thermal Runaway

Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Round Ports, 2.15 Inch Exhaust Upgrades and Parts " Up the ante in performanceManufactured 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