91-94 Nissan 240SX KA24DE 2.4L Stainless Steel Headers Exhaust + Downpipe 92 93 Replace stock restrictive headers and increase horsepower and torque.Great for DIY project as well Made of High Quality T304 Stainless Steel Material. TIG Welded CNC Machine Flange Inlet/ Outlet: 1.75"/ 2.50". O2 sensor bung is welded on the headers.Gaskets, bolts and nuts are included. Professional Installation is Highly Recommended (No Instruction is Included) Vehicle Application: 1991 1992 1993 1994 Nissan 240SX KA24DE 2.4L DOHC NonTurbo only. Does NOT fit SOHC or SR20.