CSF Engine Oil Cooler – BMW M2 / M3 / M4 (G8x S58) #8266

OVERVIEW

The CSF #8266 High-Performance Engine Oil Cooler is a direct replacement for the factory engine oil cooler on the G8X M2, M3 and M4. It is built using CSF's AC condenser technology — a 1-row super-high-pressure 32mm 10-channel microtube that maximizes oil flow and surface area contact — and carries an 8mm tall multi-louvered fin against the OEM's 6mm.

The cooler reuses the OEM top and bottom rubber seals for correct airflow management and OEM-style inlet and outlet connections, so it drops straight into the factory location with no modification. CSF positions it as an ideal upgrade for road racing, drag racing, and any S58 running increased power where factory oil temperatures become the limiting factor.

SPECS

• 8mm tall multi-louvered fin vs. OEM 6mm
• 1-row super-high-pressure 32mm 10-channel microtube built with CSF's AC condenser technology
• Optimized oil flow with maximum surface area contact
• Uses OEM top and bottom rubber seals for optimal airflow
• OEM-style inlet/outlet connections — compatible with the factory oil line fittings
• Reuses the factory mounting location and ducting
• Includes a protective rock guard
• "Drop-in" fit — requires no modifications to install
• Suitable for road racing, drag racing and vehicles with increased performance
• OEM cross-reference: BMW 17 11 8 095 293, 17 21 8 095 297, 17 21 5 A4D F50
• 2-year limited warranty

PARTS INCLUDED

• CSF #8266 high-performance engine oil cooler
• Protective rock guard
• 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 — #8266 uses the OEM seals, OEM-style line connections and the factory mounting location.
• Engine oil for topping off after the cooler is drained and refilled (installer supplied).

Installation

• CSF does not publish a downloadable installation PDF for this part. Printed installation instructions are supplied in the box.
• Installation requires no modification to the vehicle; the cooler bolts into the OEM position and accepts the factory oil lines and ducting.

Notes

• Year ranges follow CSF's current published application table for #8266. CSF lists the M3 and M4 as "G8X", which has been expanded here into the individual G80/G81 and G82/G83 body codes; the G81 M3 Touring is not sold in North America. Confirm fitment for your specific chassis with Speed Logic before ordering.

PART NUMBER

• 8266 — CSF BMW G8X M3/M4/M2 High-Performance Engine Oil Cooler

VEHICLE APPLICATIONS