Evergreen HSIEV4014 Head Gasket Set Intake Exhaust Valves Fit Honda Prelude 2.3L H23A1 DOHC 16V Fits: Honda Prelude 2.3L H23A1 DOHC 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