CSF Engine Oil Cooler – BMW M5 / M6 / M8 / M850i (F1x / F9x / G1x / G9x, V8)

OVERVIEW

The CSF #8317 High-Performance Engine Oil Cooler is a drop-in replacement for the factory engine oil cooler on BMW's twin-turbo 4.4L V8 platforms: the F10 M5, F06/F12/F13 M6, F90 M5, F91/F92/F93 M8, G14/G15/G16 M850i and the G90/G99 M5. It was developed with Carbahn to handle the extra heat of their S63 Stroker Kit and is aimed at high-output builds where oil temperatures can exceed 240°F (115°C) on hot track days.

CSF also built the cooler to be more robust than the factory unit, whose low mounting position is prone to leaks and damage — especially on lowered cars. A bar-and-plate core replaces the OEM tube-and-fin design for better efficiency and impact resistance, with cast end tanks, CNC-machined connection blocks and 100% TIG-welded construction.

SPECS

• Bar-and-plate aluminum core (OEM: tube and fin)
• Core thickness: 60mm (2.36 in) vs. OEM 45mm (1.77 in) — approximately 33% larger core
• 14 cooling tubes and 15 fin rows vs. OEM 11 tubes and 12 rows
• 6.5mm fin height vs. OEM 8mm
• Increases oil capacity by 0.5 qt (0.47 L)
• Cast aluminum end tanks; 100% TIG-welded construction (OEM: brazed)
• CNC-machined connection blocks and mounting brackets with OEM-style inlet/outlet connections
• Individually leak and pressure tested
• Finish: satin black
• Replaces BMW OEM 17 21 2 284 260 and 17 22 8 746 756
• 2-year limited warranty

PARTS INCLUDED

• Complete kit as supplied by CSF Radiators; see the installation instructions for the full bill of materials.

TECH RESOURCES

Additional Parts Required

• None. CSF specifies no additional hardware for this part — it uses OEM-style connections and the factory mounting location.
• Engine oil to cover the additional 0.5 qt capacity and top-off after installation (installer supplied).

Installation

• CSF does not publish a downloadable installation PDF for this part. Contact Speed Logic for installation support.
• Plug-and-play fit; CSF recommends trimming the OE ducting and the lower radiator cradle for better fitment.

PART NUMBER

• 8317 — CSF F1X M5/M6 / F9X M5/M8 / G9X M5 High-Performance Engine Oil Cooler

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