bauml15

Im wondering what kind of mods i can make to increase HP and/or fuel efficiency. Ive heard mixed reviews in regards to a cold air intake with a turbo so I also wouldn't mind if someone could clear that up for me!

Thanks.

a4audi4fun

Best bang for buck is modified ECU software from companies like Revo, APR, Giac, Unitronic. They are probably the most well known but there are others as well. This software will give you a noticeable performance improvement whereas I doubt you will actually notice the slight improvement a different intake might provide. Search this and other Audi forums to get a ton more information.

Axis

CAI wont benefit a F/I engine. Change your filter often.

And as mentionned by a4audi4fun a flash from the stated above company's will improve power delivery while maintaining reliability.

I would go with Unitronic since they're Canadian and I like to encourage our own economy.