B-Line Motorsports, the original developers of the top mount oil coolers on the 2001-2007 WRX & STi's, has once again done it! We are proud to announce that our top mount oil coolers for the 2015 thru 2020 STi's are now available.
Utilizing B-Line Motorsports unique setup, the `15-`20 STi’s now have a true oil cooling option with our top mount oil cooler kit.
Engineered to function at its best, endure abuse, and look good doing it. With a simple and straight forward installation, high engine oil temps can be dropped by as much as 35°F (1.7°C).
Kit Details: 
High-Capacity / High Efficiency 25 Row Oil Cooler
Double Braided -10AN Aircraft Quality Hose (stainless inner braid with nylon outter braid)
High Flow Aluminum Thermostatic Oil Filter Sandwich Plate Adapter (185°F / 85°C) 
Aluminum Aircraft Quality -10AN Fittings
Vehicle Specific, B-Line Motorsports Designed and Manufactured Aluminum Mounting Brackets
Extreme Heat, Protective Hose Sleeving
All Necessary Installation Hardware
Detailed Installation Instructions 
 
Shown with optional air diverter (sold seperatly)
 
Note: Kit fits with most aftermarket headers and charge piping. Installation with certian brand componests may need addtional spacer to clear properly.