I've only talked to one guy who did this upgrade over at
www.flat6.com. He had reliability issues as expected. The boxster 6 was never intended to see forced induction. My question is why do it? If you are going to plunk down that coinage why not get a 3.4 or 3.6L engine? I'd rather have 320hp naturally aspirated hp than 390 turboed ponies myself.