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Not sure what you're referring to here. There a tons of people running the twin turbo kits on otherwise stock VQ35 engines that aren't experiencing engine failure. Sure, push any engine beyond a certain point and you're going to experience failures, no mystery there.



Blowing out bottom-ends is a fairly common (and obviously very serious) problem that many VQ35 owners have encountered. If you're not sure what I'm referring to, simply run a search on any number of Nissan forums. Will every VQ35 blow up with a turbo on it? No. But I would certainly be worried about doing it with as many occurences of blown engines as there has been with doing much less than that.

2003 Mazda6s 3.0L MTX Webpage 2004 Mazda3s 2.3L ATX