LOL nice response Raccordv4....
Ok u can look on
www.ecisbmw.com for thier dyno results and how much hp u can expect from ur car. I would recommend getting the heat shield and intake. As far as how much hp u should expect from an intake,exhaust, chip? It really depends on the company that produces each product...i don't have a 325 so i will let someone that does have ur mods answer.