Well I may not be much of help but I bought a T04B35... but the interesting thing about my turbo is that it a has an exhaust housing A/R of 1.00 and turbine of A/R 60... anyways i did all necessary mods to install including a G-Power 50mm wastegate... on my mustang 4.6 sohc V-8 with mods im producing 700whp thats on 93 octane pump gas, single turbo, 10.7 psi and nitrous oxide... i believe the history of the rotomaster T04B35 is a common turbo for domestic car and truck applications... you can also find the T04B35 on VWs...