the engine is not the same.a base rsx comes with the K20A3specsisplacement: 1998 cc Compression: 9.8:1 Power: 155|hp(115 kW) @ 6500 rpm Torque: 141 lb·ft (191 N·m)* (191 N·m) @ 4000 rpm Redline: 6800 rpm a 2005 type s rsx comes with the K20Z1specsisplacement: 1998 cc Compression: 11.0:1 Power: 210 hp (154 kW) @ 7800 rpm (SAE net J1349 Rev 8/04) Torque: 143 ft·lbf (194 N·m) @ 7000 rpm (SAE net J1349 Rev 8/04) Redline: 8100 rpm they are not the same at all. they are from the same engine family but design/parts are not the same.the intake manifold is diff also the rsx come with a plastic one and the type is is alum i think.