The HKS Hi-Power Exhaust for the 2007-2009 MS3 is one of the best options available hands down. It is designed and manufactured in Japan and is made from SUS304 Stainless steel. The piping is ceramic coated to keep heat energy in the exhaust system which increases flow and decreases back pressure.
The HKS Cat back comes with all the necessary hardware for installation.
For the price of $659, you can't find a better deal for the same level of quality and performance.
To purchase, you can click on any of the pictures. If you are a VIP member but don't know the VIP coupon code, just make sure you send me a PM and I will give it to you.