GrimmSpeed 3in Downpipe to Stock Cat Back Adapter Subaru WRX 02-21 / STI 04-21 | 077044

Fitment Info: This adapter fits 2002 - 2021 Subaru WRX, 2004 - 2021 Subaru STI, 2005 - 2009 Subaru Legacy GT, 2005 - 2009 Subaru Outback XT, and 2004 - 2013 Subaru Forester XT. Features: Say goodbye to exhaust leaks! This GrimmSpeed adapter seals an aftermarket 3 - inch downpipe to a 2.5 - inch OEM or OEM - like catback exhaust. It has a flared end for a smooth transition from the 3 - inch downpipe to the OEM midpipe. The flared end, just under 3 inches, won't block flow. It works with both flat and donut gaskets. Made of CNC laser - cut steel, it offers a leak - free seal and smooth connection. It's flanged for an OEM donut gasket, won't obstruct exhaust flow, and includes installation hardware. It has a simple bolt - on design and is sold individually.

Using this adapter is easy. First, gather all the necessary tools and the installation hardware that comes with the adapter. Make sure your vehicle's engine is cool before starting. Locate the 3 - inch aftermarket downpipe and the 2.5 - inch OEM or OEM - like catback exhaust on your Subaru. Place the adapter between them, ensuring the flared end is properly aligned with the downpipe. You can use either a flat style gasket or a donut gasket depending on your preference. Then, use the provided bolts to secure the adapter in place. Tighten the bolts evenly to ensure a good seal. As for maintenance, it's a good idea to check the bolts periodically to make sure they haven't loosened. Also, inspect the adapter for any signs of damage or wear, especially if you notice an exhaust leak again. If you see any issues, replace the adapter as needed. Remember, this adapter is designed to work with a flared end, so don't try to use it with non - compatible parts.