Invidia HS22SW4HDUEL UEL Turbo Header for 2022-2026 Subaru WRX FA24 VB

Vehicle Fitment

• 2022-2026 Subaru WRX (VB/VN Platform, FA24 2.0L Turbocharged Flat-4, AWD, Manual and CVT)

Fitment Notes

• Fits the Subaru WRX VB/VN platform (FA24 engine) only - does not fit WRX STI, Legacy, Outback, Forester, or any EJ/EJ257-powered Subaru.
• Not CARB legal - this product cannot be sold to or used in the state of California.
• An aftermarket front pipe (sold separately) is recommended to maximize flow gains when using this header.
• Cometic gaskets, if ordered separately, are made to order with a typical 1-2 week lead time.

Features

• Unequal length (UEL) design produces the signature Subaru burble exhaust note while improving turbocharger spool and exhaust scavenging.
• 50mm-60mm SUS304 stainless steel piping replaces the restrictive factory manifold for improved exhaust gas flow and reduced back pressure.
• Cast stainless steel collectors and flanges ensure leak-free fitment, long-term strength, and resistance to warping under heat cycles.
• 3D-scanned for precise fitment on the VB/VN WRX chassis - direct bolt-on installation with no modifications required.
• Robotic TIG welding on every unit guarantees uniform, consistent weld quality across the entire system.
• Faster turbocharger spool response results in improved low- and mid-range torque delivery from the FA24 engine.

Specifications

• Part Number: HS22SW4HDUEL
• Type: Unequal Length (UEL) Turbo Header / Exhaust Manifold
• Piping Diameter: 50mm-60mm
• Material: SUS304 Stainless Steel (piping and flanges)
• Collector/Flange Type: Cast Stainless Steel
• Weld Type: Robotic TIG welding
• Fitment Method: Direct bolt-on, 3D-scanned for VB/VN chassis
• Warranty: 12-month manufacturer warranty
• CARB Status: Not CARB legal - not for sale in California

Included Components

• 1x Unequal Length Turbo Header / Exhaust Manifold (HS22SW4HDUEL)

Product Description

The Invidia HS22SW4HDUEL is an unequal length turbo header engineered specifically for the 2022-2026 Subaru WRX (VB/VN) powered by the FA24 engine. By replacing the factory exhaust manifold with larger 50mm-60mm SUS304 stainless steel piping, this header reduces back pressure and improves exhaust gas velocity, allowing the turbocharger to spool faster and more efficiently. The unequal length design also restores the classic Subaru boxer exhaust note - a characteristic burble that enthusiasts know well - which is muted on the factory manifold. Cast stainless steel flanges and robotic TIG welding throughout ensure a leak-free fit and long-lasting durability through repeated heat cycles.

Invidia uses 3D scanning of the WRX underbody during development to guarantee a precise, direct bolt-on installation with no cutting or modification required. This header is not CARB compliant and cannot be sold in California. An aftermarket front pipe is recommended to pair with this header for full system flow gains.