Using this HKS Hi - Power Cat Back Exhaust is easy. Just have it installed by a professional mechanic following the vehicle's standard exhaust installation process. When it comes to maintenance, regularly check the exhaust for any signs of damage or loose parts. You can clean the polished tip with a mild metal cleaner to keep it looking shiny. Remember, if you're using a stock j pipe or downpipe, you need to buy the GrimmSpeed Subaru Stock DP to Aftermarket 3' Catback Adapter separately. Also, always drive carefully and avoid hitting the exhaust on rough terrain to prevent damage.