2006-2011 Civic SI model only (FG & FA) Tri-Y 4-2-1 Header

This Circuit Werks 2006-2011 Civic SI model header is a race header designed with great power and price. The stainless 4-2-1 design makes for good low mid and high end power. The 4-2-1 optimizes scavenging with equal length stepped tube primaries ending at a 2.5 Inch collector. This header also includes test pipe, gaskets & all necessary assembly hardware.