I have installed today the MBRP exhaust and I have mixed feelings about it. First of all, I can feel some improvements in the performance and the car feels more responsive than before. Second, At WOT I can't really tell how the exhaust sounds because the Arrington CAI on my car is really loud and it is almost all what I hear, though I can tell that the car is louder now somehow. Third, it wasn't a perfect fit and the mechanic had to do some adjustments to make sure that the tips won't touch the plastic piece on the sides of the tips. Also, the mechanic showed me that the pipes are very close to the differential which could be a problem if the the pipes rattle and hit the differential. Lastly, I made the decision to buy this system after I have learned that MBRP added resonators and fixed the drone issue. Unfortunately, after seeing some pics of the MBRP drone free system and comparing it to what I have I can see that there are no resonators on my car. I guess Marylandspeed.com sold me the old system and I kinda feel like I have been fooled. Although I have checked the part number and it matches the part number on MBRP website. I have already paid $150 for installation, will pay the same again for taking in it off and again for the new one. So thats $300 in case I wanted to return it back and get a new one. What I am trying to say here is that there is drone, very loud drone, Its not very big of a deal if that MBRP added some hp to the wheels but I was hoping for a drone free system. I have emailed marylandspeed.com and now waiting to see what they have to say about this issue.