Evergreen HSHBIEV4010 Head Gasket Set Head Bolts Intake Exhaust Valves Fit Honda Acura Isuzu Vtec F23A1 SOHC 16V Fits: Honda Acura Isuzu Vtec F23A1 SOHC 16V (see description below) Guaranteed to fit and meet the specifications of the OE parts being replaced Each gasket and gasket set is made to be durable and long-lasting Improve fuel economy and overall engine performance Increased durability and less wear under extreme conditions, easily lasting 3 times longer than the OEM valves