I just had my SOLO Street Race Exhaust installed and it is awesome. When I had it installed the shop technician wanted to know where I bought it because "it was the best system" he has ever seen. This was an older experienced mechanic. The sound is great. I have lambo doors on my car, pull into a gas station and a guy walks up and comments on the sound of the car and doesn't even look at the doors. When I ordered the kit, I had ordered quad tips but got the rectangular ones. I called up the guys at SOLO and they sent the replacement tips in 2 days. Easy swap and sent the rectangular ones back. They responded immediately and obviously cared that I was satisfied with my order. I have to say that this is one of the best buys I have ever made for a car. Gave me nice pep, and the sound is exactly what I could hope for.