Optimal downpipe kit for Subaru WRX STI 2007-2018: performance, quality, innovation Discover the next level of performance enhancement for your 2007-2018 Subaru WRX STI with our state-of-the-art download kit. Developed from high quality cast stainless steel 1.4301 (SS304), this kit offers a range of benefits that will take your driving performance to a new level. Technical specifications: High quality cast stainless steel: Manufactured from premium cast stainless steel 1.4301 (SS304) for maximum durability and corrosion resistance. Diameter: Complete with a Ø76mm (3 ) diameter for optimized performance and flow. CAD-designed and flow-optimized: Through precise CAD designs and flow optimization, the Y-pipe kit ensures optimal flow dynamics for maximum performance. Lambda probe connection: Equipped with a lambda probe connection for precise exhaust gas measurements and efficient performance optimization. Racing metal catalytic converter: Contains a high-quality racing metal catalytic converter (300 CPSI with EU6 coating) for optimum emission control and performance. Easy installation: 100% perfect fit, easy to replace with the standard part, without complex modifications. Reduced thermal load: Minimizes the thermal load on the turbocharger, which increases service life and optimizes performance. Increased performance: A noticeable increase in performance is achieved by reducing back pressure, resulting in significantly improved torque. Optional after-cat replacement pipe: Optional Ø76mm (3 ) after-cat replacement pipe for additional flexibility and power adjustment. Quality, performance, innovation: Our downpipe kit for the Subaru WRX STI 2007-2018 stands for quality, performance and innovation. Transform your driving experience and experience the unparalleled performance of your Subaru. Discover the future of performance enhancement with our downpipe kit - perfectly matched to your Subaru WRX STI 2007-2018. part number 500001026.KATERSATZ Disclaimer for catalytic converters It should be noted that Wagner Tuning catalytic converters are intended for use on OEM vehicles for performance optimization. They are NOT intended for use in conjunction with ECU tuning. Wagner Tuning GmbH & Co. Kg. accepts no responsibility for damage caused by modifications to a vehicle, such as a tuned ECU and/or 'burble' style tunes. Wagner Tuning GmbH & Co. Kg. is also not responsible for damage caused by engine malfunctions that create rich/lean conditions that are detrimental to the catalytic converter. All claims regarding a catalytic converter are subject to a warranty check. In order for a warranty to be honored, Wagner Tuning GmbH & Co. Kg. requires the purchaser to prove that the engine has been set up unchanged and in accordance with the original manufacturer's specifications and has been kept in proper working order. The end user assumes all responsibility for the legality of the use of a non-OEM catalytic converter on their vehicle for the region in which it is used.