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For what it's worth, I bought the vrsf charge pipe last August and it fit in my 2015 N55 e84 X1 perfectly. My only troubles installing were because I was lazy and didn't fully remove the air box, so it was tight reaching underneath it blind to get it connected to the throttle body. I also liked that it came with a new oring for the TB connection - my old one still looked good, but I swapped in the new one anyway since it was fresh. The only thing I didn't like were my meth bungs seem galled shut (good thing I don't plan on using them), and it's hard to judge how tight to tighten the hose clamp without crushing the oem plastic intercooler outlet pipe - but you'll have that issue with any charge pipe unless you also upgrade the intercooler outlet.
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