aFe Power is proud to introduce all new Twisted Steel headers for the 2013-2015 Scion FR-S/Subaru BRZ 13-15 with the H4-2.0L engine. These high quality 304 stainless steel tubing race proven headers are available with a 200 CPSI 48-state legal catalytic convertor or in a catless “Race” version. In testing, the catted (“street”) header gains up to +10hp and +13lbs. x ft. torque as verified by our in-house dyno. This “street” version delivers pure, race-inspired power and produces an aggressive and exciting exhaust sound during hard throttle. aFe spent countless hours of R&D to develop the perfect balance of race-inspired performance and sound with zero drone. The unique headers are engineered with tuned 1-5/8” diameter, near equal length 304 stainless steel tubing for increased horsepower, torque and a faster “race like” throttle response. To eliminate dead space that can cause turbulence and hinder flow, a 4-to-1 formed collector combined with optimized tube lengths help increase exhaust velocity improving flow. Includes all components for a quick hassle-free installation with no modifications necessary.