Category: Exhaust Systems and Performance Parts Exhaust systems are an essential part of any vehicle's performance. They help to improve the flow of air through the engine, which in turn helps to increase power output. In this review, we will be taking a closer look at some of the best exhaust systems available for Subaru WRX STI models. First up is the Invidia HS02SW1DPN No-Polished Down Pipe for Subaru WRX STI. This downpipe is designed to improve airflow and power output, making it a popular choice among performance enthusiasts. It features a mandrel bent design that helps to reduce restrictions in the exhaust system, allowing more air to flow through the engine. The pipe is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this downpipe is an excellent choice for anyone looking to improve the performance of their Subaru WRX STI. Next up is the Invidia HS02SW1UPP Up-Pipe for Subaru WRX STI. This up-pipe is designed to work in conjunction with a cat-back exhaust system, and it helps to further improve airflow through the engine. The pipe features a mandrel bent design that reduces restrictions and allows more air to flow through the engine. It is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this up-pipe is an excellent choice for anyone looking to take their Subaru WRX STI's performance to the next level. The Invidia HS02SW1DPO Twin O2 Sensor Bung Down Pipe for Subaru WRX STI is another great option for those looking to improve the performance of their vehicle. This downpipe features twin O2 sensors, which help to monitor the engine's exhaust gases and ensure optimal performance. The pipe is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this downpipe is an excellent choice for anyone looking to improve the performance of their Subaru WRX STI while also ensuring safe operation. The CarXX 3 Inch Exhaust Downpipe for Subaru WRX/STI EJ205 2.0L / EJ257 2.5L 2002-2007 is a great option for those looking to improve the performance of their vehicle without breaking the bank. This downpipe features a mandrel bent design that helps to reduce restrictions and allow more air to flow through the engine. It is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this downpipe is an excellent choice for anyone looking to improve the performance of their Subaru WRX/STI without breaking the bank. The Invidia HS05SW1DPO Divorced Wastegate Twin Sensor Bung Down Pipe for Subaru WRX STI is another great option for those looking to take their vehicle's performance to the next level. This downpipe features a divorced wastegate design, which helps to improve airflow and power output through the engine. It also features twin O2 sensors, which help to monitor the engine's exhaust gases and ensure optimal performance. The pipe is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this downpipe is an excellent choice for anyone looking to improve the performance of their Subaru WRX STI while also ensuring safe operation. The 2" Turbo Up-Pipe Up Pipe Non-Reso Exhaust Race Performance For Subaru Impreza WRX & STi is a great option for those looking to take their vehicle's exhaust system to the next level. This up-pipe features a mandrel bent design that helps to reduce restrictions and allow more air to flow through the engine. It also features a non-resonated design, which helps to improve sound quality and overall performance. The pipe is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this up-pipe is an excellent choice for anyone looking to take their Subaru Impreza WRX & STi's exhaust system to the next level. The Invidia (HS02SW1GTT) N1 Single Layer Cat-Back Exhaust System with Titanium Tip for Subaru WRX STI is a great option for those looking to improve the performance of their vehicle while also adding some style. This cat-back exhaust system features a single layer design, which helps to reduce restrictions and allow more air to flow through the engine. It also features a titanium tip, which adds some style to the exhaust system. The pipe is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this cat-back exhaust system is an excellent choice for anyone looking to improve the performance of their Subaru WRX STI while also adding some style. The Invidia (HS11STIGTT) N1 Twin Outlet Single Layer Cat-Back Exhaust System with Titanium Tip for Subaru WRX STI 4-Door is another great option for those looking to improve the performance of their vehicle while also adding some style. This cat-back exhaust system features a twin outlet design, which helps to reduce restrictions and allow more air to flow through the engine. It also features a single layer design, which helps to reduce restrictions and allow more air to flow through the engine. The pipe is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this cat-back exhaust system is an excellent choice for anyone looking to improve the performance of their Subaru WRX STI 4-Door while also adding some style. The PitVisit Downpipe Donut Gasket Compatible with Subaru 2002+ WRX 2004+ STI 2005-2009 Legacy GT 2013+ BRZ Scion FR-S Toyota 86 is a great option for those looking to improve the performance of their vehicle without breaking the bank. This downpipe features a donut gasket design, which helps to ensure a secure fit and prevent leaks. It also features a mandrel bent design that reduces restrictions and allows more air to flow through the engine. The pipe is made of stainless steel, which ensures durability and resistance to corrosion. Overall, this downpipe is an excellent choice for anyone looking to improve the performance of their Subaru WRX/STI without breaking the bank.