Question about basic performance mods
 

As this is my first car that I will be really modifying properly I was wondering why people say that you should try and get mods from the same company I. E. A Perrin intake and Perrin exhaust. How important is this? I can see why you would want to do this but I'm not sure if anything negative can come from mixing companies like a Greddy exhaust and an air raid intake?

You can get parts from different companies. Don't let others tell you otherwise. Some people like sticking with one company for a full solution for OCD reasons (i.e. Perrin logos on all their parts). You can have a Perrin exhaust, with an Airaid intake, or aFe. Hell, you could have a different brand front pipe and overpipe, and change the catback. Most of these companies are set to fit where factory parts were.

Brand loyalty versus personal preference. Do your research and choose whatever parts you like.

Exhaust is one that is good to stick with one brand without trial and error on fitment issues.

Some companies state that their products are all part of a tuned package.. That the exhaust is tuned to the intake and so on.. I got the injen intake because at the time, people was getting the most power with the fewest issues.. I personally was going for the greddy intake to go with my soon to get evo 3 exhaust.. But after seeing some people with throttle dir problems and stuff, I decided to get the injen.. I knew what exhaust I was getting from the get go... Mainly because When I was into the import scene a decade ago.. Greddy was one of the absolute best, and apexi.. BUT.. Lisa at TSI in El Paso made me want their exhaust really bad.. I just couldn't afford it.. And if it wasn't for a amazing deal at evasive I wouldn't even have a aftermarket exhaust now..

In the end.. I think whatever you decide to get, getting a tune is your best bet.. All the parts tuned as best as possible will give you the most power