factory lines to the radiator are leaking on my audi, and the only replacement is the dealer at a cost of over 400 dollars. I'm thinking why not just install an aftermarket one? My main question is if it would be as efficient as the factory cooler, as most of them are meant to be used in conunction with the stock one, and i would be using only the aftermarket one.

Any advice or thoughts on where to find a small, high quality one?

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.