5/16 Adj. Guideplates SBC/SBF 8pk

The 5/16 Adj. Guideplates SBC/SBF 8pk from Air Flow Research are precision-engineered pushrod guide plates designed for small block Chevy and small block Ford engines. These components stabilize pushrods during high-RPM operation, reducing deflection and maintaining consistent valve timing across the entire powerband. Whether you're building a street performer, competition engine, or restoring a classic, proper pushrod control is non-negotiable for valvetrain reliability and peak performance.

Constructed from hardened steel with black oxide finish, each guide plate features a flat design that accommodates 5/16-inch diameter pushrods—the standard for most SBC and SBF applications. The adjustable design allows fine-tuning of pushrod geometry to optimize clearance and minimize wear without sacrificing valvetrain geometry. Black oxide coating provides corrosion resistance while maintaining a professional appearance under the valve covers. This eight-piece set supplies enough plates for a complete dual-valve-cover engine setup, ensuring comprehensive pushrod support across all eight cylinders.

These guide plates are essential for builders upgrading to aftermarket cylinder heads, high-lift camshafts, or aggressive valve springs that demand superior pushrod control. The set fits both small block Chevrolet (262–400 ci) and small block Ford (221–302 ci) platforms, making it ideal for cross-platform engine swaps and restorations. Installation requires minimal machining and integrates seamlessly with stock or performance rocker arm assemblies. Proper pushrod guiding prevents valve train chatter, reduces noise, and extends component life under sustained high-RPM conditions.