Killer B Motorsport Subaru WRX FA20 Twin Scroll Header w/ Swain Coating

The factory OEM manifold is designed as a cost-effective component whereas, the Killer B Motorsport Performance Header is designed with the goal of Maximizing Exhaust Gas Performance and Increasing Power. Equal Length Twin Scroll Design improves exhaust gas scavenging, increasing the engine’s ability to make power. Available for the traditional OEM (or OEM style) turbocharger, or Dual External Wastegate version to deliver Maximum Performance Potential.