Shaft - Big Chief/Duke Heads Narrow Intake

The Shaft – Big Chief/Duke Heads Narrow Intake from T AND D MACHINE is a precision engine component engineered for high-performance big block and wedge-style cylinder head applications. This intake shaft assembly is purpose-built for users demanding exact fitment and reliable valve train geometry in competitive and street performance engines. Whether you're building a race-ready powerplant or restoring a classic muscle car, this component ensures proper valve actuation and optimal airflow through your narrow intake port configuration.

Manufactured to tight tolerances, the Shaft – Big Chief/Duke Heads Narrow Intake features precise diameter and length specifications critical for rocker arm geometry and pushrod clearance. The narrow intake configuration is specifically designed to work with Big Chief and Duke casting profiles, where port spacing and air velocity demand exacting component matching. T AND D MACHINE's reputation for precision machine work ensures that valve lift ratios, rocker geometry, and overall valve train dynamics remain consistent across multiple installations. This component's compact profile (2.7 x 0.9 x 3.1 inches) and lightweight construction (0.18 lbs) minimize rotational mass while maintaining structural integrity under high-RPM operation.

Builders and engine machinists will find this intake shaft essential when assembling Big Chief or Duke cylinder head combinations requiring narrow intake manifold compatibility. Installation demands proper alignment with rocker arm centerlines and pushrod length verification to prevent geometry errors that compromise valve sealing and port flow. This component is compatible exclusively with Big Chief and Duke heads utilizing narrow intake configurations—verify casting part numbers before ordering. For optimal results, pair with matched rocker arms, pushrods, and valve spring packages calibrated to your specific compression ratio and RPM target.