The PRW head studs for the 6.0 liter Ford Powerstroke diesel engine add more clamping force over the stock units. These head studs are made of 4135 chrome-moly steel and use 12-point nuts. The head studs are reusable and are also cold-rolled after being heat-treated to keep them straight.
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This farm-built twin-turbo Cummins-powered 1968 Ford F-250 has a 1998 Dodge 2500 chassis and 1-ton running gear.
