Using these Perrin 7mm wheel spacers is straightforward. First, make sure your vehicle is in the compatible model range, like Subaru STI from 2004 - 2021, WRX from 2002 - 2024, or BRZ from 2013 - 2024. Double - check that the bolt pattern (5x114.3 or 5x100) matches your vehicle. When installing, follow the included installation instructions carefully. Use only good - quality, undamaged lug bolts, studs, and nuts. Improper installation can lead to loose wheels, so be extra careful. As for maintenance, since these spacers are hard - anodized, they're quite resistant to corrosion. But it's still a good idea to clean them regularly, especially if you drive in harsh conditions. Check the tightness of the spacers from time to time to ensure everything stays secure. And remember, wheel spacers are a final sale item, so always verify fitment before placing your order.