SDR Oversized Head Stud Kit Honda TRX400EX

These head studs are for repairing the 400EX cylinder after the thread in the cylinder are damaged or can be installed in a new cylinder to help prevent head gaskets failing as quickly. They have shown to have over 70% more holding strength then the stock head studs due to the increased diameter and the longer threaded area on the studs. HONDA TRX400EX Head studs will pull the threads loose in the cylinder anytime that the cylinder gets too hot breaking down the aluminum. There are several causes of this including overheating of the cylinder during resleaving and poor matching of fuel octane to the engine. Critical Note: These heavy duty studs cannot be used if the cylinder was drilled and tapped for Helicoils or drilled and tapped for any other oversize studs with a differant thread diameter and pitch. HONDA TRX400EX OVERSIZED HEAD CYLINDER STUD KIT.