aFe Power Twisted Steel Long Tube Header 2002-2014 WRX / 2004-2021 STI
1-5/8" - 2-1/2" 304 Stainless Steel Construction:This system is constructed of 1-5/8" - 2-1/2" mandrel-bent brushed finished 304 stainless steel tubing for maximum strength and durability. Unequal Tube Lengths:This header features Unequal Tube lengths to accentuate the iconic Boxer Rumble. Laser Cut Flanges:Factory style laser cut steel flanges are used for a secure, leak-free seal. Installation:Utilizing factory style flanges this system is designed to fit in the stock locations with no cutting or modifications required for a hassle-free installation. Formed Collector:Formed collectors decrease turbulence and increase exhaust velocity. The result is increased horsepower, torque and improved throttle response. TIG-Welded:100% TIG-welded for race proven strength and durability. Emissions Disclaimer:This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.