I have the Roush TVS installed by Elder Ford who claim to largest Roush dealership in the South East. I daily drive my car. Love it. No problems. This thing screams when you get on it. My best time on street tires so far is 7.26 in the 1/8 at 100.16 mph. I'm pretty sure I can crack into the 6...
My car had the Roush axle back on it for 2 days from the dealer and then I swapped them out for my Corsa axle-back. I would say the Roush is a bit louder and slightly deeper while the Corsa sounds a bit more exotic. Everyone says my exhaust sounds great. Some people say the Roush drones slightly...
The front wheel bearing cap have to be tapped in with a hammer slightly for the 20x10 wheel to fit the wheel center caps. I'm running a 5mm spacer on the front as a precaution, without it there is about 2-3mm clearance.