Get your 600 dollar exhaust, then lay it next to a Butler system. Better yet, fit them in your driveway back to back... youll soon see Kewdale 1, China 0.
You get what you pay for. 'Do it once - do it properly' springs to mind......
Add headers too for full advantage. Either length, depending on your pref.
And dawn, speak to [FOBZ] re any Varex Q's.
Brent.