S400 T4 Turbo Turbine Housing 0.90/1.00/1.10 A/R

S400 T4 Turbo Turbine Housing 0.90/1.00/1.10 A/R S400 Turbine Housing T4 Foot Accepts 83/74mm Turbine Wheels What A/R Housing should you select?. (Assuming 5.5l-7.0l, 3/4-1 ton pickup trucks as the application) 0.90 A/R - Quickest spool up.