The opposite, actually; due to popular demand, they had actually been brought back... Now, with specials on the x47r's and their almost imperceptible 300 rpm higher spool time, is the x37 a good buy/choice? Well, if you have already decided you want the absolute quickest spool time possible then yeah, x37... hell, just swapping out for the bigger inlet added a bit of spool tine on the stock turbo and it's actually very nice for daily driving by smoothing out the torque curve.