Will these caps fit my valve stems?

These are universal rubber caps designed for standard valve stem sizes. Test-fit on your engine before committing — if they slip or bind, swap for a different size.

Do I need to clean or prep the valve stems before installing?

Wipe down the stem with a dry cloth to remove any oil or grime — helps the cap seat properly and stay put.

Can I leave these on year-round or should I remove them in winter?

Rubber caps handle temperature swings fine. Leave them on for full protection. Just check monthly to make sure they haven't cracked or loosened from vibration.