The plastic piece that the second radiator cap goes on. Its about an inch tall and held on by two bolts. Its a 88 vert. And also does someone make an aftermaket on because i tried another used one and it is also deteriated. Ive been searching but i cant find the exact name to find it. Thanks

 

you can buy them new at mazdatrix.




http://mazdatrix.com/b8.htm

 

thats it thanks

 

Bottom, all-metal one is an FD part.
It doesn't have the overflow fitting on it.
I just drilled and tapped for a barbed fitting, and it will outlast the car now.


-Ted

 

radiator cap adaptor. get the o ring too, n326-15-174