ELH headers you'll be lucky if you have any Subie rumble. Mine is decreased with my UELH because my GTSpec Headers I would say flow better than the stock set-up. But, its still unequal... You have the Cobb TBE? The headers will change the tone of your exhaust more so than it'll make it louder. Louder is a bigger turbo or a more annoying catback. My car is loud but I'm sure some of these guys with fartcans are a lot louder than mine.
378awhp/373wtq Custom Dom 3 & CBRD tuned 2006 STI.
"When in doubt...flat out" - Colin McRae