I should be receiving my Taitec Parrallel exhaust from ScienceOfSpeed any day now... I'm really excited about the new look and sound it will add to my car... but of course one of the most important reasons to do the mod is the added power right? I currently have K&N Cone Filter and stock engine and stock exhaust and soon to use Taitec exhaust. How much power would the exhaust give me? 5RWHP? 10RWHP? Whats a realistic number?