Seller notes

Speedmaster Ford SB 289 302 Windsor Zinc Finished Steel Main Girdle w/ HardwareSpeedmaster billet 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. The main girdles are zinc plated for rust resistance.Speedmaster billet steel ...

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