Ford 351C Cleveland Natural Steel Main Girdle Only aluminum and 100 percent pressure-

aluminum and 100 percent pressure- tested to eliminate leak

This upgraded combination elevates the standard in electronic fuel injection

Speedmaster rocker arm adjusting nuts are high-quality polylocks designed for full roller rocker arms

They feature a chrome plated dipstick and tube that uses a fully polished billet aluminum handle

designed to be used with aftermarket intakes only

Ford 351C Cleveland Natural Steel Main Girdle Only aluminum and 100 percent pressure-Speedmaster Steel main girdles are machined from 1045 steel. Speedmaster has designed these main cap girdles to reinforce the alignment of the main caps in high performance applications and counter the limited webbing and weaknesses of those stock blocks. Flat surfaces are finished with CNC machine center for accuracy and smoothness.