Tomei Expreme Unequal / Equal Length Exhaust Manifold Kit - Subaru WRX 2015 - 2021

MFG: TB6010-SB04A - Unequal 

MFG: TB6010-SB04B - Equal 

Fitment Information:
2015-2021 Subaru WRX (FA20DIT)

Features:

• Equal length / Unequal Length design
• SS304 Stainless 
• 45mm inner diameter tubing
• 42mm turbine side ports
• Slip fit style runner sections
• Gaskets, hardware and heat wrap included

This Tomei header is a bolt on horsepower adder! Being that this is the equal length option, the sound of your car wont change drastically like the UEL version, but you'll be able to notice a difference. Made from super high quality 304 stainless, this header might just be the last one you ever get :)

Expreme Series Unequal Length Header for 2015 - 2021 Subaru WRX by Tomei

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 powerband 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 turbo side of the OEM headers severely restricts the flow of the exhaust gas, resulting in loss of 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 OEM headers turbo side port is severely restricted by its 33mm port 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.