The F2 exhaust is created by F2 themselves and is a smaller tuning company in SoCal. Therefore you will not find the exhaust anywhere else. The F2 exhaust is currently all sold out because they are redesigning it. In the past they used SCI design so they would like to create their own design. I'm not sure if they finished yet and just haven't updated the website but you can always call them or email them. They might have some of the older designs that you can get and a discounted price. I'm currently using the old design and it is working perfectly.
They have turbo kits for many current mazdas and is currently developing a supercharger kit for the mazda3. Both kits will be showcased at Mazfest at CalSpeedway May 23rd.
