CSF Subaru Impreza STI 2008-2014 High-Performance Radiator

CSF has over 5 decades of experience 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. This genuinely multi-fit combo unit goes a step further than a standard radiator, integrating a built-in oil cooler directly into the design, so you get both engine coolant and oil cooling upgrades in a single part.

The 2-row, 42mm core uses CSF's exclusive B-Tube technology. Rather than a regular oval "O"-shaped tube, CSF uses a specially engineered tube shaped like a "B", carefully formed and brazed over the seam to seal. This increases the heat transfer surface area of the tubes by approximately 15% over regular tubes, delivering the efficiency of two smaller tubes versus one large tube within the same space, and allows CSF to use thinner, lighter aluminium with better cooling efficiency, since this design is actually stronger than normal welded "O"-shaped tubes. High-efficiency, multi-louvered fins are precisely aligned and wind-tunnel tested for maximum heat rejection efficiency. This is a true drop-in fit design requiring no modifications to install, with OE-style brackets all CNC machined and welded for genuine durability, and inlet/outlet connections designed to match the OE connections.

Works with: OEM mounting points and hose connections. Single-pass core with top-centre inlet and driver-side outlet.

Why Choose This Radiator

• Genuinely multi-fit combo unit, built-in oil cooler integrated directly into the radiator
• CSF's exclusive B-Tube core technology, approximately 15% more heat transfer than regular tubes
• CNC-machined, welded OE-style brackets for durable, precise fitment
• Wind-tunnel tested multi-louvered fins for maximum heat rejection
• 100% all-aluminium, TIG-welded construction, eliminating the OEM's plastic tank weak point
• True drop-in fit, no modifications required

Compatibility

• Subaru Impreza WRX STI (2008-2014)
• Subaru Impreza 2.5i (2008-2011)
• Subaru Impreza Outback Sport (2008-2011)