SES1205DP - Injen Technology Performance Down-Pipe w/High Flow Catalytic Converter

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Key Features

Direct fit for the
2008-2014 Subaru Impreza WRX Sti H4-2.5L Turbo
2015-2020 Subaru WRX STi H4-2.5L Turbo
2008-2014 Subaru Impreza WRX H4-2.5L Turbo
- High Performance downpipe with included hi-flow catalytic convertor
- For a racing downpipe without a catalytic convertor, please use Injen's SES1204DP
- Does not fit 2015+ WRX Models - STI only for 2015+
- Dyno Proven gains of up to 24 hp and 12 lb-ft. of torque
- Full 76MM piping made from premium 304 SS Mandrel-Bent Tubing
- Beautiful CAD Designed 304 stainless steel investment cast turbo bellow
- Turbo Bellow is a divorced-style design to reduce turbulence and improve performance
- Turbo Bellow includes the upper O2 sensor bung
- Hand Crafted and TIG Welded to Perfection for Strength and Durability
- Designed and Manufactured in Pomona, CA
- Note: This Part kit is not CARB exempt at this time and is not legal for sale in California or use on vehicles registered with the California Department of Motor Vehicles.


Injen Technology has examined the stock down-pipe and found prominent potential on improving the OE design by using mandrel bent stainless steel for optimum flow and corrosion resistance. TIG-welded by hand for race proven durability and endurance and eliminating any possibility of cracking during heat cycles. All of the Injen downpipes are uniquely designed to increase exhaust velocity for improved horsepower and torque. Just like all of our other performance parts, we dyno test our Down Pipes in-house and proudly build them in Pomona, CA.


HP Gains: 24.6 HP
Torque Gains: 11.2 ft/lbs
Replacement Filter: N/A
Black Hydroshield: N/A
Red Hydroshield: N/A
Prop 65 Information: This product can expose you to chemicals including Chromium, Nickel & Cobalt, which are known to the State of California to cause cancer.

Shipping Information

Weight: lbs
Box Dimensions:
Length: 47 in
Width: 19 in
Height: 12 in
UPC Code: 843115014391

CARB Information

Compliance Specification: RACE ONLY
CARB Model Year Coverage:

Warranty Information

SES Intercooler and exhaust systems that have been installed will not be eligible for return under any circumstances. Injen Technology offers a Limited Lifetime Warranty to the original purchaser against defects in material and workmanship. Injen Technology will replace, at no charge, any Injen product considered by Injen Technology to be defective. Any and all warranty coverage is limited to the repair or replacement of the defective part only, at Injen Technology's discretion. Proof of purchase is required. The warranty does not cover incidental or consequential damages, damages caused from improper installation, nor does it cover the cost of installation or removal of the defective part or its replacement. All warranty items must be sent freight prepaid with a valid RMA (Return Merchandise Authorization) number and copy of original invoice. Most exhaust and Intercooler system installations may require a lift and or specialized tools. Due to the installation complexity of automotive exhaust and Intercooler systems, Injen Technology recommends that a qualified technician perform the installation. Most local Tuner or exhaust and muffler shops offer professional installation.