Yes, we sell mufflers, cats, ect... Exhaust is primarily what we sell but we also do just about everything undercar from brakes to chassis. What motor did you stick in your fc3s? Can't tell if your sig is a joke or you really stuck an ls1 in it, or if you have the tII motor.

--edit: n/m I saw your buildup thread. Nice. I would love to get my hands on even a stock fc3s. The potential the wankels have is absolutely unreal. rx-7's are undoubtedly my third favorite car.