Using your Billetworkz Shifter Stop is easy. First, make sure your Subaru WRX is parked safely. Then, install the shifter stop according to the simple instructions - it only takes a few minutes. Once installed, adjust it to your preference to get that precise feel when shifting into 1st and 2nd gears. As for maintenance, since it's made of anodized 6061 aluminum, it's quite durable. Just keep it clean and free from dirt and debris. Remember, the standard processing time for BilletWorkz products is 1 - 3 business days for in - stock items, but custom orders may take longer. If you need your item sooner, contact the seller directly. And always be aware of the warning information at (http://www.p65warnings.ca.gov).