Hi guys, I'm currently running the stock CT9 setup, using the stock 4efte manifold, downpipe and midpipe, followed by a custom made 2" catback exhaust, with a 2.5" backbox. However, my goal is to have a free flowing exhaust system, that won't be too loud, yet can make some decent power on a td04l setup. 1. Based on your experiences, how would you describe a HKS silent highpower, with a td04l setup at 1.2bar? 2. Will it's smaller diameter midpipe restrict the flow from the WEPR downpipe? 3. Can i still use my current custom made exhaust? Thanking you in advance... Cheers.