Your car already comes with unequal length headers and I don't think there will be much if any benefit of putting aftermarket ones on or even equal length ones on an N/A.
If you just want some more rumble with your exhaust then just get diff backs, probably easier to find and will be a lot cheaper.
If you want more power then I wouldn't be wasting money on trying to get a couple of kw and instead save your money and trade your N/A in for a wrx!
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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600
EBISU SUBARU, SHIBUYA-KU TOKYO
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