Cxracing Turbo Manifold for Civic Integra DC5 RSX K20 Sidewinder T3 38mm This Kit is for K20 Converting NA to Turbo Sidewinder Design, Perfect Fitment, No Cut or Removal of Stock Parts. CNC Cut Flange. 1.75" OD Stainless Steel Mandrel Bent Tube Runner. T3 Turbo and 38mm Wastegate Flanges.