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wrong answer. thats about the worst way to put it on,
punishment racing has a nice recirc o2 housing that replaces the stocker, cut the flapper off our dsm turbo and put it on there. it may not be exactly the cheapest, but its a great option, and much safer than leaning the hell out of number1
That is what i've done (but with a custom o2 housing rather than a punishment racing one). Don't forget to open up the stock wastegate hole in the exhaust housing a bit while you're at it, as it's kinda small from factory (20something mm from memory).
This is mine:
Puts the wastegate here:
