Vibrant Performance Turbo Flanges are made of 1/2" thick Stainless Steel. T3/GT30R - T3/T4 - GT30R - GT30/GT40 TURBO FLANGE Bolt Pattern: 3.375" x 1.75 T25/T28/GT25 - T2 - GT28 - GT25/40R TURBO FLANGE Bolt Pattern: 2.85" x 1.60"
