the rebuild is you can choose .50 a/r compressor or .60 a/r compressor. The cost of the hybrid is $695. + shipping.The other upgrade like this one cost $595. + shippingi was thinking on a upgrade like this one just for a few bucks more ,need opinions its a garrett gt3271 internal wastegated and here are the specs http://www.exileturbo.com/images/pdf/GT3271.pdf