This post is help out anyone with a B9 RS5 that is looking to upgrade their exhaust. Hopefully I can save someone a lot of money and time from the mistake I made. I will compare my stock Audi sport exhaust to an aftermarket @millteksport touring resonated exhaust with high flow catalytic converters. About a little over a year ago I opted to go for the complete Milltek sport set-up. The first video the car is completely stock as it came from the dealer. If you slide to the left the second video is the high performance @millteksport exhaust. As you can hear in the video the stock Audi exhaust sounds better. In my opinion it's more aggressive and more raspy sounding. Also it was weird that I had more cabin drone than I did with the stock exhaust even though the Milltek was quieter outside than the stock exhaust. But when one purchases an exhaust you don't only want a louder sounding exhaust. Louder doesn't mean more power. So being that I went with high flow catalytics and a higher flowing "performance" exhaust I would have expected more power/performance. Well that wasn't the case either. When comparing dragy passes to the before and after there was no difference at all. I would have thought after spending thousands of dollars I would have at least gotten a performance gain but I didn't get either performance or better sound. But what I did get is an exhaust that rattled upon launch and hard turns. So I contacted @millteksport in England on the phone first about the rattling issue. Not once did I mention that the car did not perform any better even though I spent so much money. My main concern was the horrible rattling coming from the front, the rear the sides just everywhere. They were very quick to blame the mechanic. They said I should go to an authorized dealer which my mechanic is an authorized Milltek dealer after realizing that they said they will call them and tell them how to install it and they will send their representative from Connecticut to my mechanics shop which they did. Their representative Greg at the time agreed that the way the exhaust flaps were mounted in the rear was a very poor design and that's why it was hitting my very expensive factory carbon fiber rear valence. And also about the rattling every time I launch the car they had this to say they told me "not" to launch it so hard. So I have a performance exhaust on a performance vehicle and I'm not supposed to launch it that hard. Thanks @millteksport because as I mentioned to them multiple times it wasn't just the launching. I also had to slow down on the turns on the Poconos raceway track also because I didn't know if my wheel was falling off but it was just the exhaust rattling along the side and the rear. The hotter the car got the more the exhaust expanded and rattled like a piece of junk. They continued to blame my mechanic. If I hadn't seen it for myself and how much time and effort my mechanic put into installing this exhaust how many things they had to adjust to work around the Milltek exhaust I would have believed Miltek. Countless of emails and phone calls but Miltek continued to blame the installer. So I went to another mechanic just to see well he said he could not have installed it any better himself and the poor quality of the @millteksport exhaust was to blame. Then I asked around on the Audi forums and I ran into multiple people that had the same issue one guy had to actually take a hammer to his @millteksport exhaust to solve the problem. Well I refuse to take a hammer to an almost $10,000 exhaust system. I don't know if it was their poor quality during covid or maybe they just don't care anymore. Their quality control is not what it used to be and neither is their customer service. They just don't care. I had this exhaust installed a little over a year ago and up until 2 months ago I was still contacting @milltekspor to do something for my exhaust and they just didn't care. In the end I had to remove the @millteksport exhaust and reinstall the stock exhaust and I had the stock resonators deleted and it sounds a million times better and performs a million times better. In all the conversations I had with people on forums about this issue no one complained about @awetuningofficial or @officialcapristoexhaust or @armytrix_official The only complaints I heard were about @millteksport exhausts. So this post is just to any other people looking to upgrade their exhaust. If you have a stock Audi sport exhaust save yourself the money and don't upgrade your exhaust or at least don't get a @millteksport exhaust. The only reason I went with Milltek is because of their quality in the "past" and they offer the exhaust flap option. Well their quality is not what it used to be and their customer service is horrible and the exhaust flaps we're poorly designed and caused me to have rattles because they were touching my rear carbon fiber valance. Luckily it didn't break it or it would have cost $5,000 to repair. Upon my whole build all the companies I have worked along with have been amazing with me. @awetuningofficial replaced my carbon fiber air intake because the first one they sent me was a bad batch and it started to fade. One phone call and they sent me a brand new one immediately no questions asked that's how you deal with the issue. Then this build would not have been possible without @kmdtuning and @weistec We had a lot of hiccups along the way due to some other companies diverter valves but we worked together as a team and got it working right. @weistec customer service is unreal they respond immediately and they care about their customers. Any questions I had they answered and explained thoroughly and any issues we had they worked countless hours to solve along with @kmdtuning I hope this post will save someone time and money. Research any company you are going to purchase any items from. Ask questions go on to social media platforms, forums and find out what others have to say. I've been quiet about this for over a year trying to give @millteksport the chance to correct this and recognize their horrible quality control and do something about it. Well after their silence and ignorance to my situation I chose to no longer be silent about this so that someone else doesn't make the same mistake I did.
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Originally Posted by dal59
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