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.. The CSF #8145 Cooling product is designed to be a "Drop-In Fit" application. The product will install in the OEM Location with no modifications necessary unless otherwise noted or instructions are included in the product package. Please see the manufacturer repair manual for standard installation instructions. If you do not feel confident installing this product CSF recommends taking it to a qualified installation facility.. Considering their expertise and success from other BMW cooling systems, CSF created yet another upgraded oil cooling system - this time for BMW's N55 engine. N55 powered BMWs have become popular among track and performance enthusiasts. With optimum oil temperatures maintained, drivers can dominate the track without the dreaded "cool down" or "limp mode" breaks.. CSF offers the best and most advanced Oil Coolers on the market. So when it comes to keeping your engine oil temps down as you push your N55 Powered BMW hard on the street or track, a CSF Oil Cooler is the obvious choice.. "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. CSF 11-16 BMW 135i(X) 5 Door F20 / M135i(X) 3 Door F21 Race-Spec Oil Cooler. High-Density Multi-Louvered Fin Design for Maximum Surface Area Contact. Track Tested and Proven by Hittman Racing's M235iR Endurance Race Car. BMW F3X / F2X (N55) Race-Spec Oil Cooler. CSF 8145 - BMW N55 F3X / F2X Oil Cooler. Innovative 2-Core In-Series System. Engine Oil Cooler. CSF Oil Cooler

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