I'm sure exhaust systems for SS Commodores have been discussed endlessly here and I've read a lot of posts about different exhaust mods to make the MY12 SSV sound like a real V8, but if I only have $1000 to spend and want to get a good note with minimum drone (sedan) what's the best way to spend $1000? Ideally I guess I'd like to add headers and a good cat system but I don't think I can do all that for $1000. Also have to allow some money to retune it I expect? Despite using terms like these, I don't really speak exhaust systems so suggestions in simple language would be good for me. Should add that mine's a manual, not an AFM.