The APEXi GT Spec Radiator Cap function-s to in-crease the pressure inside the radiator allowing the coolant's boiling point to increase. Improves overall cooling performance and boiling can be avoided. A great item that truly works. Made by APEXi Japan.
Fits
94-01 Acura Integra
02-06 Acura RSX
99-10 Acura TL
04-10 Acura TSX
92-10 Honda Civic
11 Honda CR-Z
93-97 Honda Del Sol
07-09 Honda Fit
97-01 Honda Prelude
00-09 Honda S2000
05-10 Lexus IS250
00-05 Lexus IS300
06-10 Lexus IS350
93-98 Toyota Supra
+Other cars with equivalent fitment.