Higher pressure inside of the cooling system helps the coolant flow better and also increases the coolant's heat absorbing qualities. The Buddy Club Racing Spec Radiator Cap has a pressure capacity of 1.3kg/cm2, in comparison to a factory cap that has a pressure rating of only 0.9kg/cm2. This means that the coolant's boiling point can be raised by using the Buddy Club cap, improving radiator efficiency and overall cooling performance. Advantages are of course found on demanding conditions such as circuit racing or spirited driving. A great item that truly works. 

Vehicle applications: 90-93 Integra/Accord, 88-91 Civic/CRX, 90-91 Prelude, 93-15 Subaru Impreza (Including WRX / STi)