The servo repair kits don't include much, filter, bellows etc. but no valve.
I replaced mine w/ new and am happy but the one I bought (from Rovahfarm) needed to have the pushrod locking collar filed down to allow me to adjust the rod in enough. As supplied, the servo was causing the brakes to drag.
'85 90 2.5NA
'72 SIII 88"
Couple other cars