I had this set custom made, since I couldn't source them off the shelf, but have since changed my mind. These adaptors will take the guesswork out of using the following turbos for the VG30DETT: GT2560R: 466541-1 GT2560R: 466541-4 (inconel) GT2860R: 739548-9 GT2871R: 472560-15 GT2871R: 707160-10 (inconel) GT2871R: 780371-2 (inconel) GT2871R: 771847-1
They have been precision machined and use viton O-rings rather than gaskets for less chance of boost leak. For the above turbos, you also need to clock the housings, add on wastegate brackets, and the difficult work is all done. These eliminate the need to cut and reweld inlet pipes or "stretch" the outlet couplers to reach. $155 shipped (and I wont even charge ya for paypal).