Using this exhaust system is straightforward. First, gather all the included parts: the exhaust manifold, up pipe, turbo gaskets, exhaust wrap, and hardware kits. Install the exhaust manifold and up pipe following the standard installation procedures for your Subaru WRX or STI model. Make sure to use the turbo gaskets to ensure a proper seal. Wrap the exhaust with the provided 50' x 2in exhaust wrap for better heat management. For 2002 - 2005 WRX models, check if your vehicle needs a 2.5l STI oil pan, and for 2006 - 2007 WRX models, install the STI oil cooler and oil pan as required. When it comes to maintenance, regularly inspect the exhaust system for any signs of damage or loose connections. Clean the stainless - steel parts with a mild cleaner to keep them in good condition. If you notice any air leakage or abnormal noise, check the gaskets and connections immediately.