For Honda Accord CB7/CB9 Stainless Steel 4-1 Header/Exhaust Tubular Manifold Application: 90-93 Honda Accord 2.2L SOHC 4-1 High Performance Racing Spec. Design 1.75" Inlet / 2" Outlet / 8mm Thick Header Flange TIG Welded CNC Machine Flange Increase High Flow Air, Instantly Gain 10 -15 Hp. / Tq.