Rzcrew Garage 4-2-1 Exhaust Header

Featuring a 4-2-1 pipe configuration, this header is engineered to optimize low-end torque while maintaining or enhancing top-end horsepower. Constructed from premium 304 stainless steel, the header boasts mandrel-bent tubing for smooth exhaust flow and durability. Buyers must select their specific vehicle configuration during the ordering process, choosing between heat shields with either 3 or 4 bolts and indicating whether their vehicle is the FED type (no catalytic converter) or PZEV type (includes a catalytic converter). This header has been dyno-tested and proven to increase horsepower by 8.70 HP and deliver significant torque gains on a stock engine. It is specifically designed to fit the Mitsubishi Lancer GT CY4A (2007-2009 and 2009-2018 models with the NA 4B11 I4 engine) and the Galant Fortis CY4A (2007-2009 and 2009-2018 models with the NA 4B11 I4 engine).