Using your BC Racing BR series coilovers is easy. First, adjust the ride height according to your style and needs. You can do this by turning the adjustment knobs. To adjust the damping, use the 30 - level adjustment feature for both compression and rebound. Remember, BC's patented concave lower locking ring keeps all your adjustments locked. When it comes to maintenance, it's a good idea to regularly check the coilovers for any signs of wear or damage. Since the coilovers are completely rebuildable, if you notice any issues, you can buy individual parts separately. Also, if you've opted for the rear extenders, use them to change the dampening range without the hassle of removing the rear seat. Custom kits take a bit of time to ship, so be patient and wait for up to 8+ weeks from the order date.