Agency Power Unequal Length Header WRX (2002-2014) STI (2004-2018) MINI Cooper the Turbo XS midpipe is

the Turbo XS midpipe is full 3" diameter

Subaru OEM Intake Manifold to Tumbler Gasket - These are the gaskets that sit on top of the tumblers

Why do you want the enlarged bore style vs

- Rear Sections excluding tips

Enkei's pocket design around the bolt circles increases rigidity and keeps the wheel cooler during aggressive race driving

Agency Power Unequal Length Header WRX (2002-2014) STI (2004-2018) MINI Cooper the Turbo XS midpipe isThe all new Agency Power stainless steel unequal length header kit is now available for your Subaru WRX, STI & Legacy GT. A special designed collector enables perfect flow into the uppipe providing faster turbo spool and increased horsepower. The AP header features polished 321 stainless steel for a show quality finish. The header has CNC machined inch thick flanges and includes everything you need to bolt directly on to your turbo Subaru. Installing