Fitment Information: This exhaust fits 2015 - 2021 Subaru WRX and 2015 - 2021 Subaru STI, except the 2019 STI and 2018 STI R/A. It only works with an OEM or OE fitment mid pipe, not with the SPT exhaust or other aftermarket systems. Features: Upgrade your car's sound and look quickly with the Nameless Performance Axleback Exhaust. Replace the heavy factory mufflers with mandrel - bent, TIG - welded T304 stainless steel pipes and configurable tips. The 5 - inch muffled axleback comes with 4 - inch polished single - walled tips. The laser - cut flanges and 2 - inch dual piping offer great flow, increasing high - end horsepower and low - end torque by about 10hp/11ft lb at the wheels. You can easily upgrade to a full catback exhaust later by buying the Nameless 3' Midpipe. It fits directly with factory exhaust components and is easy to install. Specifications: Mufflers are 5 inches, exhaust tips are 4 inches, single - wall style, polished color. It has a staggered and quad exit, laser - cut flanges, T304 stainless steel piping, mandrel - bent and TIG - welded. It directly fits the OEM mid pipe, has a factory - style exhaust hanger rod, and includes a full hardware kit and installation guide. California Prop 65 Warning: Working on your vehicle can expose you to harmful chemicals. Minimize exposure by avoiding exhaust fumes, idling the engine only when necessary, servicing in a well - ventilated area, and washing hands often.

Using the Nameless Axleback Exhaust is easy. First, gather all the parts in the hardware kit included with the product. Make sure you have the right tools for the job. Remove the old factory mufflers from your 2015 - 2021 Subaru WRX or eligible STI model. Be careful as these can be heavy. Then, attach the new axleback exhaust using the laser - cut flanges. The exhaust is designed to fit directly with the OEM mid pipe, so it should go on smoothly. Connect the exhaust hanger rod as it's in a factory - like style. After installation, check all the connections to make sure they're tight. When it comes to maintenance, keep an eye on the T304 stainless steel pipes. If you notice any signs of rust or damage, clean the affected area with a mild stainless - steel cleaner. Avoid using harsh chemicals that could damage the finish. Also, check the welds regularly. If you live in an area with a lot of road salt, wash your car and the exhaust more frequently to prevent corrosion. Remember, operating your vehicle exposes you to chemicals, so follow the California Prop 65 guidelines. Don't idle the engine for long periods, and service your car in a well - ventilated area.