DC Sports NHS4201B Infiniti FX35/G35 Coupe/G35 Sedan/M35 Polished Stainless Steel 3-1 Header, Brushed Dyno tuned and tested against the competition for maximum performance 3-into-1 design emphasizes a broad increase in power across RPM range for street/track applications 100% 304 polished stainless steel (including flanges) Equal length primary piping ensures optimum tuning for more power across rpm range