TRX400EX Cylinder & Head Stud Kits

Strengthen your engine build with TRX400EX cylinder and head stud kits—designed for durability, reliability, and high-performance applications. These kits are ideal for riders rebuilding their Honda TRX400EX top end or upgrading for more power. Replacing factory bolts with heavy-duty studs helps maintain proper torque under high compression and extreme conditions, reducing the risk of head gasket failure. Whether you’re running a stock setup or a big bore kit, these cylinder and head studs provide the secure, lasting hold your engine needs.