Using this DBA 4000 Series front slotted rotor is simple. Just install it on your Subaru STI (2004 - 2017) or WRX (2008 - 2014) with Brembo brakes following the standard brake installation process. Remember, it won't work on vehicles without Brembos. For maintenance, regularly check the rotor for any signs of excessive wear, warping or cracking. Clean the non - friction areas periodically to keep the paint protection effective and prevent rust. If you notice any unusual noises or a change in braking performance, have it inspected by a professional. This rotor has a 12 - month or 12,000 - mile warranty, so if there are any issues within this period, you can get it sorted out with the seller.