Korsh Unequal Length Headers for Subaru WRX / STI / Forester / Liberty EJ20/25

Korsh Unequal Length Headers — Subaru WRX / STI / Forester / Liberty (EJ20/EJ25)

Korsh Unequal Length Headers are engineered specifically for EJ20 and EJ25-powered Subarus to unlock measurable performance improvements. The strategically designed unequal length configuration optimises exhaust scavenging for sharper throttle response, faster turbo spool-up, and enhanced power delivery across the rev range. Constructed from 304 stainless steel with cast flanges for a perfect, leak-free fit — built to handle sustained high-temperature operation on both street and track.

Best of all, the unequal length design retains the iconic Subaru boxer exhaust sound.

Suits:

• Subaru WRX (EJ20 / EJ25)
• Subaru STI (EJ20 / EJ25)
• Subaru Forester (EJ20 / EJ25)
• Subaru Liberty / Outback (EJ20 / EJ25)

Kit Includes:

• 1x Unequal length exhaust manifold (304 stainless steel)
• 1x Up-pipe
• All gaskets and hardware

Specifications:

• Material: 304 stainless steel
• Flanges: Cast — precision fitment, no warping
• Design: Unequal length (UEL) — retains iconic boxer exhaust note
• Benefits: Faster turbo spool, improved exhaust flow, better throttle response
• Fitment: Direct bolt-on — all gaskets and hardware included
• Warranty: 2 years

Available Part Numbers:

• KOR-EXH-UEL-001 — Korsh Unequal Length Headers, Subaru WRX / STI / Forester / Liberty (EJ20/EJ25)

Why Korsh?

• ✅ 304 stainless steel construction — corrosion resistant and built for sustained high-temperature operation
• ✅ Cast flanges for perfect, leak-free fitment — no warping, no gaps
• ✅ Unequal length design retains the iconic Subaru boxer exhaust note
• ✅ Complete bolt-on kit — all gaskets, up-pipe, and hardware included
• ✅ 2-year warranty — backed by Korsh for peace of mind on every purchase

If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.

Installation

We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.

Note

Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.