IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT
IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT
IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT
IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT
IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT
IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT
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IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT

$849.99
IAG-EXT-1000
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IAG Performance Unequal Length 3-Bolt Header & Uppipe - Subaru WRX 2002-2014 / STi 2004-2021 / FXT & LGT

The IAG Unequal Length Headers are the perfect way to add more performance to your Subaru WRX STI and still keep the iconic "Boxer Rumble." The headers are fully constructed of 304 stainless steel, including cast stainless flanges! The unequal length headers feature a 45mm pipe diameter for maximum flow and performance. Due to the free-flowing design of this header, you will see gains across the entire RPM range, as exhaust flow is vastly improved. The header also features a slip-joint expansion section to accommodate for flex caused by heat cycling. Each IAG header is fully TIG welded for maximum strength.

Each header package includes the IAG 60mm uppipe that utilizes a 3-bolt cast flange and multi-layer gasket between the manifold and uppipe, providing a stable connection without exhaust leaks. The IAG Header & Uppipe adds all of the hardware and high quality, multi-layer gaskets needed for installation including specialty copper exhaust nuts, which are proven to maintain their torque even in the extreme conditions of heat cycling present at the exhaust flange.

Package includes:

  • (x1) Unequal Length Stainless Steel Header
  • (x1) 3 Bolt Stainless Steel Uppipe
  • (x1) 3 Bolt Uppipe Gasket
  • (x3) Uppipe to Manifold Zinc Plated Bolts and Nuts.
  • (x5) Uppipe to Turbo Threaded Studs
  • (x1) EGT Plug
  • (x6) Copper Flange Nuts (Manifold to Head)
  • (x2) Manifold to Cylinder Head Gaskets
  • (x1) Uppipe to Turbo Gasket


Fitment Notes:

  • 2002-05 Subaru WRX Requires 2.5L STI Oil Pan
  • 2006-07 WRX Requires STI Oil Cooler and STI Oil Pan
  • 2002-07 WRX / STI Chassis requires slight modification to the passenger side U-Frame.
  • 2004 Forester XT Requires STI Oil Cooler and STI Oil Pan
  • 2005-08 Forester XT Requires STI Oil Cooler
  • 2005 Legacy GT Requires STI Oil Pan
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Returns Policy

Returns may be accepted within 14 days of purchase pending Return Merchandise Authorization (RMA). No returns or cancellations on special order items. All returns will be charged a 20% restocking fee, no exceptions.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Item must be able to be resold as new. Several types of goods are exempt from being returned. Hazardous materials, fluids, greases, chemicals, and clothing are not able to return.

Free shipping is available within the lower 48 states for most orders totaling $199 or more. A free shipping option will be available during checkout. This offer is for delivery address in the continental United States and excludes shipments going to Alaska, Hawaii, Military Boxes, and items that require freight shipping.

Processing Time
Patterson Performance stocks a large quantity of items at any given time. Some items may require drop shipping from one of our various distributors. In stock items will ship within 1-2 business days. If you're needing your product quickly, please contact us to verify product availability before placing your order. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time. Estimated shipping dates are not guaranteed and are subject to change based on inventory levels and manufacturer lead times. Backordered items are shipped immediately once available.

Items ship daily, If the item you ordered is not in stock, a member of our team will contact you via email / phone.

Patterson Performance will only ship to an address that varies from your billing address if payment is made via Paypal or a financing partner.

Patterson Performance ships from multiple warehouses throughout the United States, and sometimes from manufacturers overseas.

You can simply contact us via email / telephone for a live inventory check

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