AJUSA CYLINDER HEAD BOLTS FOR SUBARU IMPREZA GC GM GD GG G11 G3 G12 G22 EJ205 EJ207 EJ255 2.0 2.5 F4Ajusa Head Bolt Set Engineered For Strength, Sealed For Reliability Ajusa cylinder head bolt set is engineered to deliver the precise clamping force required to maintain a secure seal between the cylinder head and engine block. Designed for modern combustion systems, these critical fasteners ensure proper compression while preventing leakage of gases and coolant, even under extreme thermal and mechanical stress. Manufactured from premium grade alloy