Using this Perrin Front Mount Intercooler is straightforward. First, make sure you have both the core and the piping kit as they are sold separately. Refer to the installation guide for the installation process as it can be difficult. Once installed, your Subaru STI should be ready to go without any tuning. For maintenance, regularly check the beaded ends to ensure the hose clamps and couplers are still connected and sealed. Keep an eye on the coolant levels in the expansion and overflow tanks. The powder - coated finish helps protect the parts, but avoid using abrasive cleaners that could damage it. If you have any issues, contact the manufacturer as it comes with a 5 - year warranty.