Most Speedtech parts are common between the different turbo manufacturers, however the following parts are specific to the turbo and/or vehicle specifications the kit was built for:  * Recirculating Wastegate Pipe (Bottom Mount and Top Mount kits) * Bottom Mount Kit RH motor mount (differs between AWD and RWD) * Oil feed line/fittings and oil drain block (Bottom Mount and Top Mount kits) Therefore, if you purchase a secondhand kit that was built for a BorgWarner turbo, the above parts will be different if you switch to a Precision, Garrett or VSR turbo and vice-versa.  Example #1: If you purchase a Bottom Mount Recirculating kit that was built for a Precision and are switching to a Borgwarner, Garrett, VSR or vice-versa, the recirculating wastegate pipe fitment will NOT line up properly. Note that the flex couplers in both the wastegate and down pipes are not meant to accommodate this improper fitment. Example #2: If you purchase a Bottom Mount kit that has a RH motormount for a RWD car, and you have an AWD car; the RH motormount will not fit. Example #3: If you purchase a kit built for a Precision and are upgrading to a Garrett turbo, the oil feed line/fittings and oil drain block will be different. You will also be missing the coolant line/fittings.