CSF High-Performance Aluminum Radiator - Fits 2005-2009 Subaru Outback / Legacy

CSF has over 5 decades of experience in manufacturing radiators. So when it comes to keeping your engine cool and your WRX/STI running at its best, a CSF High-Performance All-Aluminum Radiator is the obvious choice. Designed to perform on the street or at the track, a performance radiator is a must-have for both high-horsepower builds and race vehicles that require added cooling performance in motorsports environments. This radiator features a 2-Row core with CSF's exclusive B-Tube Technology: Unlike a regular oval shape "O" type radiator tube, CSF uses a specially engineered tube in the shape of a "B". These "B-tubes" are carefully formed and then brazed over the seam to seal. CSF is able to use thinner and lighter aluminum material (with better cooling efficiency) because this design is actually stronger than normal "O" shape tubes that are welded. The design (inlet in the middle of the tube that is seam-brazed) increases the heat transfer surface area of the tubes by approximately 15% over regular tubes, producing the efficiency of two smaller tubes versus one large tube within the same space criteria. With "B-tubes" you are able to get "dual liquid laminar flow". CSF also uses ultra-efficient multi-louvered fins that are carefully and precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in our wind-tunnel lab.

This radiator fits the manual transmission models only! It can work on the Automatic Transmission models if you get an external transmission cooler along with this radiator. We recommend this Mishimoto Transmission Cooler for automatic transmission models.