I have their 3" system on my Barracuda with TTI headers. It had to have a lot of tweaking to get it to fit correctly. The mufflers are 2 pass turbo mufflers and they are loud. I bought a set of resonators to help quiet them down. I`ve read that even people who have Hooker headers have quite a time making the system fit. I would definitely rrecommend getting a good muffler shop to install them.