3.0 Inch Downpipe Header

The Full-Race 2012-2015 Honda Civic Si & ILX 3.0 inch Downpipe V2.0 Header is engineered to provide maximum exhaust flow for both naturally aspirated and supercharged applications. This header is constructed from durable 304 stainless steel and features precisely TIG-welded, large radius mandrel bends designed for optimal exhaust gas evacuation. The V2.0 revision includes a fully cast bellmouth to enhance durability and mitigate cracking issues common in previous designs. This downpipe offers substantial performance benefits by significantly reducing back-pressure, allowing your K24Z7 engine to operate more efficiently and achieve peak power. With a Full-Race Flashpro tune, users can expect gains of 25+ horsepower. For those prioritizing emissions compliance or seeking a quieter exhaust note, a high-flow catalytic converter option is available; otherwise, a non-catalytic straight pipe version caters to race applications. Installation of this downpipe is recommended in conjunction with an upgraded rear motor mount to properly handle the increased engine torque and reduce drivetrain movement. The package includes CNC-machined stainless steel oxygen sensor bungs to ensure proper sensor functionality. This downpipe is specifically designed to fit the 2012-2015 9th generation Honda Civic Si and 2013+ Acura ILX models.