2017 Q60 Red Sport AWD 27,000 miles. I replaced my Infiniti Sports Axle Back exhaust to a cat back Motordyne Shockwave exhaust from Outcastgarage.com. Most impressed with the increased performance throughout the rpm bandwidth. Feels quicker and pulls harder. The sound simply said is Motordyne. Often replicated but can’t be duplicated. No drone compared to the to the axle back. Looking to get the AAM or HKS resonated downpipes to complete the setup.