x4 alloy valves fits most cars to be honest but dose fit Ferrari 208.308.328.348,355,360,.
audi. vw. bmw . ford. peugeot .
these are no good for tpms sensors 

these are good for replacing standard rubber valves that are leaking as these can tighten up and the rubber valve cant go any tighter this will help with corrosion on the alloy at the valve hole to stop ail leaking at the valve .
if its bad put bead sealer  or silicone on the seal of the valve then fit .this will stop leak from the valve .