I recently purchased a mishimoto radiator and wanted an aftermarket cap other than the one that was provided. I went and got an arc radiator cap but it doesn't fit. Does anyone know what size cap i need to get for the radiator? I think the nissan and mitsubishi radiator caps are a little larger but i am not sure if it will fit. If anyone can help it would be greatly appriecated

 

What about the mushimoto rad cap with gauge. here is the link. Good luck
http://www.honda-tech.com/zerothread/2338192

 

thanks for the info. i'll consider it but it does look a llil too bulky.

 

Cool idea having that pressure gauge built into the cap but that it doesn't look nice