We will inspect the turbos and advise you if they have any unusable parts before we begin the upgrade. Please make sure you give us a good contact phone number. Print your Driftmotion invoice and put it in the box with your turbo. Please ship your turbo to the address on the contact page of our website. Please package it well!!! Use many strips of cardboard wrapped around the turbos if you don't have access to any other packing materials. Double boxing it is a good idea also. Thank you!