i think the v band on the gt20 is slightly bigger than 3 inch (not a common size), from mercades the correct clamp for that turbo is around £15 quid, so i could buy that and then make a custom band to weld to my three inch elbow.
306 XUD9 gt2052s
306 hdi stage 2 (hdi tuning)
205 STDT -new project
306 hdi stage 2 (hdi tuning)
205 STDT -new project