Main Stud girdles provide 30-35% more strength to the bottom end of your engine and they actually prevent main cap flex and main cap walk. Add a windage tray and you immediately improve horsepower. They effectively create a torque box effect on your engine and are constructed out of .39" Chromoly steel for superior strength. All kits feature high grade main cap bolts for reliable quality strength. they also help improve horsepower by acting like a crank scraper

Will work with most stroker kits 331/347. We highly recommend the use of these on ALL HIGH PERFORMANCE ENGINE APPLICATIONS This Ford 289-302 Main Cap Stud Support is designed to directly tie into the main caps. This design doesn�t need bushings or spacers and doesn�t require the main caps to be machined to mount it. The end result is a girdle that offers more support, is easy to install, and will clear large strokers. This support is 1/2" thick and is laser cut out of steel with CNC machined mounting holes, includes all hardware.

These Main Support Windage Trays bolt to the pre-drilled and tapped holes on our main cap stud supports. These trays keep the windage around the rotating assembly away from the oil in the sump and the oil in the sump away from the rotating assembly. Come with mounting bolts.