Garrett has finally released a GTX version of the 88mm wheel found on the GT40/88R and the GT37/88R turbo. Three years ago Garrett released new compressor wheels for some of its turbo line up. Most of those turbo’s were the larger GT45R and 50R verities. These turbo’s came with all new billet compressor wheels with completely different aero designs. The easiest way to spot these wheels, other than the fact that they are a nice shiny billet, is that most are 11 blade designs. Previous cast wheels in the Garrett line up were mostly 6 blade and 7 blade wheels.