Tomei Expreme Exhaust Manifold (Unequal Length), 2002-2014 WRX & 2004-2021 STi

EXPREME is manufactured from various manufacturing methods combined especially for mass production high quantity. But the flange, bend sections & gathering section are finished off with lost wax processing for superior quality.
All EXPREME products are screened with strict quality control. Even mass productions our QA levels are high to ensure the best possible product that will be worthy of the TOMEI brand name and guaranteed to meet & exceed all users expectations.
Every flaw of the OEM header has been addressed and improvised during the development of the Tomei header, resulting in power gains you can feel throughout the power band of the car.
The OEM headers restrict air flow resulting in loss of power and efficiency. Tomei headers do not restrict air flow resulting in an increase in power and efficiency.
The collector on the Tomei headers were made using the lost wax method. The lost wax method allows the collector pipes to merge smoothly, therefore eliminating any restrictions on the header.
The slide adjuster on the Tomei header allows users running thicker head gaskets to appropriately extend the header to accommodate for the thicker head gasket.
The flange on the Tomei headers is highly rigid, lightweight, and has a stepless flange.

Included:
• EXHAUST MANIFOLD EXPREME WRX/STI EJ SINGLE SCROLL UNEQUAL LENGTH
• Supplied Hardware
• Exhaust Wrapping
• Gaskets

Features:
• Stable High Quality
• High Intensity
• Durable
• (Smooth inner walls & killer looks)