CSF Dual-Pass DCT / Oil Cooler – BMW M3 (E9x, S65)

OVERVIEW

CSF's dual-pass cooler was the world's first true plug-and-play transmission cooler for the E9X M3 platform. It is built with CSF's AC condenser technology around a 1-row super-high-pressure 22mm wide 11-channel microtube, giving a dual-pass core with 11 cooling tubes against the OEM's 10-tube single-pass design.

The high-density multi-louvered fin adds 20% more surface area contact than the factory unit, and the cooler lab tests around 30% more efficient than OEM. It is a drop-in fit that accepts every OEM attaching component — oil-line connections, mounting brackets and shroud/ducting. On DCT cars it serves as the transmission cooler; on 6-speed manual cars the same unit is the engine oil cooler.

SPECS

• Built with CSF's AC condenser technology using a 1-row super-high-pressure 22mm wide 11-channel microtube
• Dual-pass high-performance core with 11 cooling tubes versus the OEM 10-tube design
• High-density multi-louvered fin design with 20% more surface area contact than the OEM unit
• Lab tested at approximately 30% more efficient than the OEM cooler
• Serves as the transmission oil cooler on DCT cars and the engine oil cooler on 6-speed manual cars
• Drop-in fit requiring no modifications — accepts all attaching OEM components including oil-line connections, mounting brackets and shroud/ducting
• Replaces OEM part number 17227521376
• 2-year warranty to the original purchaser under normal use

PARTS INCLUDED

• CSF #8042 dual-pass transmission / oil cooler
• Complete kit as supplied by CSF Radiators; see the installation instructions for the full bill of materials

TECH RESOURCES

Additional Parts Required

• None. CSF Radiators specifies no additional hardware for this part — it is a drop-in fit that reuses the OEM oil lines, brackets and ducting.

Installation

• CSF does not publish a downloadable installation PDF for this part. Printed installation instructions ship in the box.

Notes

• DCT cars run this unit as the transmission cooler; 6-speed manual cars run the same part as the engine oil cooler.
• 335i / 335is / X1? See CSF Race-Spec Oil / DCT Cooler – BMW 335i / 335is (N54) or CSF Race-Spec Oil / DCT Cooler – BMW 335i / X1 35i (N55). Same CSF part, listed by engine.
• CSF does not list the E93 M3 Convertible for #8042 — confirm with Speed Logic before ordering.

PART NUMBER

• 8042

VEHICLE APPLICATIONS