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Why ?
The stock airbox is good for approx 400 hp without any noise increase.
I have heard over 400 HP by adding secondary snorkel tubes going to the reverse side of the airbox.
I agree...i think the same goes for the Saab 9-3 SS...most of the HP increase comes from the exhaust end of the system...Its not like a GM LS engine that needs massive amounts of air to create peak HP

Super Moderator
10,065 Posts
Welcome to the link - be sure to post some pictures of your car!

As for intake - you need to start with these two items;



If that air cleaner isn't good enough there is also this route (although the drop in will surfice for 400hp...)


After you have those two items and a good tune upgrade consider this -




Hope this helps.
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