MAPerformance 3-Inch 304L Stainless Steel Downpipe

The MAPerformance HDAXI-DPC is a performance-oriented downpipe engineered to replace the restrictive factory unit on the 11th generation Honda Civic and Civic Si 1.5T models. By incorporating smoother transitions and larger 3-inch 304L stainless steel piping, this downpipe allows exhaust gases to maintain velocity, significantly reducing backpressure and enabling faster turbo spool-up. Constructed from durable 304L stainless steel for superior corrosion resistance and appearance, the HDAXI-DPC features a high-flow, MAPerformance-spec catalytic converter capable of supporting up to 500 horsepower. The design includes a CNC-machined turbo outlet flange and tapers to the factory connection point, facilitating a direct-fit installation with limited tools. This upgrade is intended to unlock additional power potential from the factory engine. Included with the downpipe are essential hardware for installation, such as M10x1.25 copper and flange nuts, along with studs. Optional OEM gaskets are also available. MAPerformance offers a Lifetime Warranty on this product, highlighting its commitment to quality and durability. This downpipe is designed for the 2022+ Honda Civic Si and the 2022+ Honda Civic 1.5T. Note: One customer reported that the bottom OEM heat shield does not work with this downpipe and only the top portion can be used during reinstallation. Additionally, some users have recommended heat wrap for added protection of surrounding components. An O2 extender may be needed to prevent emission codes.