Header SBC Modified 3 Step Rage Crate

The Header SBC Modified 3 Step Rage Crate by SCHOENFELD represents a purpose-built exhaust manifold engineered for serious small-block Chevrolet performance. Designed specifically for modified drag racing and high-output street engines, this header system addresses the core challenge facing hot rodders: extracting maximum power from aggressive fuel and ignition timing while managing heat and scavenging efficiency. This is the choice for builders who demand race-proven engineering in a street-legal format.

The 3-step tube design optimizes exhaust scavenging across the entire RPM range by matching primary runner diameter and length to individual cylinder firing order and displacement characteristics. Schoenfeld's stepped-tube geometry reduces backpressure at peak torque while maintaining flow velocity needed for cylinder evacuation at high RPM—a critical distinction from single-diameter headers that compromise mid-range or top-end performance. The manifold weighs 34.3 lbs and measures 20 x 10 x 41 inches, fitting standard engine bay layouts on most SBC platforms. Cast-iron construction with precision welding ensures durability under repeated thermal cycling and peak combustion pressures typical of race fuel and forced-induction applications.

This header excels in turbocharged, nitrous-assisted, or high-compression naturally aspirated SBC builds where cylinder scavenging becomes the limiting factor in horsepower output. Installation requires a quality gasket set and standard header bolts; integration with a tuned exhaust system (collector, pipes, and muffler) amplifies the scavenging benefit and unlocks measurable gains in peak power and response. Compatibility spans 262–400 cubic-inch small-blocks with conventional port layouts; verify fitment with your specific block variation and header collector diameter before ordering.