Invidia UEL Exhaust Manifold – 2022+ Subaru WRX (VB) | FA24DIT | Unequal Length | Restores Classic Subaru Burble

Restore the iconic Subaru unequal length exhaust character on your 2022+ Subaru WRX (VB, FA24DIT) with the Invidia UEL exhaust manifold — an unequal length header engineered specifically for the FA24DIT that brings back the classic Subaru burble and rumble lost when Subaru switched to an equal length factory manifold on the VB WRX, while improving exhaust flow over the OEM unit.

UEL vs. EL – Why This Matters for the 2022+ WRX

Understanding the UEL vs EL distinction is key to understanding what this manifold does:

• Factory FA20 WRX/STI (pre-2022) – UEL: The previous-generation FA20-powered WRX and EJ-powered STI used unequal length exhaust manifolds from the factory. The unequal primary pipe lengths cause exhaust pulses from the two cylinder banks to arrive at the collector at different intervals — creating the characteristic Subaru burble, rumble, and lope at idle and low RPM that became synonymous with the WRX/STI sound
• Factory FA24DIT VB WRX (2022+) – EL: The 2022+ VB WRX switched to an equal length factory manifold for improved exhaust scavenging efficiency and power output. Equal length primaries deliver exhaust pulses to the collector at equal intervals — improving mid-to-upper RPM power but eliminating the unequal pulse timing that creates the classic Subaru burble. The VB WRX sounds noticeably different — and to many WRX enthusiasts, less characterful — than its predecessors
• Invidia UEL Manifold (this product) – Restores the Burble: Invidia’s UEL manifold for the FA24DIT uses unequal length primary pipes — restoring the unequal exhaust pulse timing and the classic Subaru burble, rumble, and lope that the factory EL manifold eliminated. A direct response to the most common complaint from VB WRX owners who miss the classic WRX sound

Key Features

• Unequal Length Design – Classic Subaru Burble Restored: UEL primary pipe configuration restores the unequal exhaust pulse timing responsible for the classic Subaru idle burble and low-RPM rumble — the defining sound characteristic of the FA20/EJ WRX and STI that was lost with the VB WRX’s factory EL manifold
• Improved Flow Over Factory EL Manifold: Invidia’s UEL manifold improves exhaust flow over the factory EL unit — reducing restriction and improving exhaust gas evacuation from the FA24DIT’s turbocharged flat-four. The flow improvement supports power gains when combined with supporting modifications and a tune
• FA24DIT Direct Fit – 2022+ Subaru WRX VB: Engineered as a direct-fit replacement for the factory exhaust manifold on the 2022+ Subaru WRX (VB chassis, FA24DIT). Verify your specific model year before ordering
• Invidia Quality: Manufactured by Invidia — a respected Japanese exhaust manufacturer known for high-quality stainless steel exhaust systems and headers for JDM and performance applications worldwide

Specifications

• Type: Exhaust Manifold / Header
• Configuration: Unequal Length (UEL)
• Fitment: 2022+ Subaru WRX VB (FA24DIT)
• Part Number: HS22SW4HDUEL

⚠️ Important Notes: An ECU tune is strongly recommended after installing a UEL manifold on the FA24DIT — the change in exhaust scavenging characteristics from EL to UEL will affect boost response, fueling, and power delivery. Running without a tune may result in suboptimal performance and potential check engine codes. This manifold replaces the factory exhaust manifold only — a cat-back or downpipe upgrade may be required separately for a complete exhaust system. Professional installation by an experienced Subaru/forced induction specialist is strongly recommended. Verify compatibility with any existing downpipe or cat-back before ordering.