SRS EXHAUSTS CATALYTIC CONVERTER/TEST PIPE (S2000)SRS cat replacement test pipe S2000 The SRS cat replacement stainless steel test pipe takes away all resistance caused by the catalyst in your S2000 exhaust. The original catalyst costs you power because of the resistance it causes in your exhaust system. The SRS cat replacement test pipe is a straight tube, without any resistance. This gives your engine plenty of room to perform optimally. Material: SUS 304 polished stainless steel 60. 5 mm Includes