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.