these have always fascinated me:
http://aerocharger.com/aerochargers/
no BOV, no wastegate, no oil lines. they're not 600 hp monsters (unless you get two, but that gets expensive) but look to make for a simple, clean install. ebay injectors, silicone, exhaust piping (aerocharger provides the two exhaust flanges). plumb it suck though and you might be able to use the audi ecu with some reprogramming.
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