ARP Diesel Head Stud KitPart #: 247 4202, 247 4203, 247 4204 It is a proven fact that OEM head bolts are the weak link in a diesel engine, especially if the engine has been modified. Typically they are assembled from the factory using Torque To Yield bolts and preloaded to yield and sometimes more. Any increase in combustion pressure can lead to problems like blown head gaskets or catastrophic engine failure. It is for good reason that virtually every top professional engine
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