l hav an 07 wrx and l want add this exhaust....but ive seen on youtube that most of em are usually tilted on subarus...why? Also wen getting the exhaust will l have to buy other components with it as well? how much will thqat usually range?

The turbo engine whether it be the 2.0 or 2.5 on the wrx models sufficiently supplies enough exhaust flow to demonstrate a good exhaust note when using that exhaust, which is why many of the youtube videos r using subarus & in this case it is angled, l would advise a aftermarket downpipe possibly the one hks makes although u have many options. By range r u asking a performance boost as in hp & torque? Or r u asking the price range to attain these aftermarket parts? Either way u wo not see a extreme performance gain without the proper tuning, make sure u get some kind of engine management to properly tune the vehicle.

( l believe the main reason that the exhaust is angled & not straight back is because they wished to avoid another bend in the mandrel piping on the axleback, bends = bad)

idk about the tilt but as for the pricing, depends on what kind of upgrade u bought. most people usu. buy a full cat back sys that has everything ready to be added on. thats a true mod. if u just bought a tip for the sound, just give up.