Vance & Hines Hi-Output Hooligan PCX Exhaust System Honda Grom With PCX Technology, Vance and Hines brings the horesepower and torque while keeping you 49 state compliant. Performance Chamber Technology integrates a chambered high-flow catalyst that boosts horsepower and torque while keeping emissions at bay. Features: 304 stainless steel construction CNC machined billet end cap PCX chambered high-flow catalyst cartridge Laser engraved logo Includes hardware and brackets 49 state emissions compliant