Installing an exhaust system is kind of self explanatory. Crawl under your car and take a look. You'll probably need a good amout of lubracation and maybe even an impact wrench to get the bolts lose. A performance exhaust sytem should come with ss bolts, if not run to the hardware store. The hardest part of the whole process might be getting the car off the ground far enough to work comfortably under it. If your planning to put a new header on make sure to use a new gasket. Also, to make your life easier try and cover the exhaust bolts with anti-sieze just to make sure they don't rust on. CAI are very easy to install and should come with instructions.