CSF 11-16 BMW 135i(X) 5 Door F20 / M135i(X) 3 Door F21 Race-Spec Oil Cooler

Utilizing CSF's AC Condenser technology, their innovative dual-core in-series system features an additional 5 rows of super-high pressure multi-channel micro-tubes on the rear side of the oil cooler. The high performance tube spec, along with the high-efficiency multi-louvered fin design allows for maximum surface area contact and an approximate 40% increase in heat rejection. The High-Performance Race-Spec Oil Cooler directly replaces the factory unit, easily bringing engine oil temperatures down to a consistent and manageable level, even under extreme & extensive driving conditions.

• "Drop-In Fit" Requiring No Modifications to Install - Accepts All Attaching OEM Components Including Oil-Line Connections, Mounting Brackets and Shroud/Ducting
• Requires Additional Half Quart for Proper Fill-up During Installation (OEM Cooler: 7 Qts./ CSF's Upgrade Race-Spec N55 Oil Cooler: 7.5 Quarts)
• Secondary In-Series Backside Cooler has an Additional 5 Rows of Cooling for a 40% Increase in Heat Rejection
• Made with CSF's AC Condenser Technology Using a 1-Row Super-High Pressure 26mm Multi-Channel Microtube
• World's 1st and Only True "Plug-And-Play" Upgraded Engine Oil Cooler for the BMW N55 Engine
• Converted to a Single-Pass Design with High Pressure Return Line for Optimal Flow
• High-Density Multi-Louvered Fin Design for Maximum Surface Area Contact
• Track Tested and Proven by Hittman Racing's M235iR Endurance Race Car
• Innovative 2-Core In-Series System