MBRP's are kinda loud. I like the Excell. Anything, almost anything, is better than the stock header. Hindle's don't have donuts, but i'm not too keen on the idea of that exhaust using a 1000 springs in it to hold it all together. Don't get me wrong, their exhaust system works good too.
You'll need a fuel controller with and aftermarket exhaust. And you should get an airbox mod, or filters to compliment the whole thing.
That's my $.02 worth. Roughly $1499.98 more, you'll have everything you'll need!!