Soul Performance Products 991.1 Long Tube Street Headers are built around large diameter, free flowing HJS 200-cell catalytic converters with long tube runners for maximum gains in power, throttle response, and flat-six engine tone.DETAILS:Fits all Porsche 991.1 Carreras (2012-2016)Designed and built in-house at our Willow Grove, PA facilityPower gains of over 25 whp and ft-lbs of torque!All Soul Performance Products components are backed by our Lifetime Warranty for both street and track use