i have a 98 ej with a 98 gsr swap my radiator cap kicked the bucket and i am having a hard time finding a new one. i dont know if i need a cap for a civic or a integra. i tried to buy a cap for a integra, and it didn't fit...so i assume i need a civic cap. i was going to order a mugen cap but i dont want to get the wrong one. is there a definitive way to tell what radiator i have? thanks fellas.

 

is it a stock or aftermarket rad? the cap for the integra and newer civics are the same, a lot of the aftermarket rads use the older style cap, so go the the parts store and ask for one for a 88-91 civic/crx they use the older style caps see if its the same as your old one.

 

the caps are not the same. went to honda and essentially had to guess as to which one would work. the ones they had, one for civic and one for gsr were not the same. and neither of the two they had looked like mine. i guessed civic and it worked fine. just so you know.