I remember when I was at PrimeSpeed on November, a customer of theirs with a Z that lives somewhere in the middle east had sent them his 18G Greddy turbos because his turbos were leaking. Barry told me he had purchased this kit a long time ago and the 18G's were available back then and you could them now if you would work something out with Greddy. I know PrimeSpeed can get you the 18G turbo kit. Visit them at primespeed.com I should work for them because I advertise them so much :)