The CSF 8240 is a race-spec dual-pass oil cooler for BMW S54 engine swaps into the E36 chassis. It uses a turbulated heavy-duty bar-and-plate design with 8 rows of cooling and a high-density multi-louvered fin pitch, in a motorsport silver finish. The right side is shortened to clear the A/C lines in their original routing, so it works on cars that retain air conditioning. It accepts the factory S54 OEM oil-line connections, and CSF recommends the Europe-spec E36 M3 oil cooler lines (BMW part 17212227235).
- Type: race-spec dual-pass oil cooler
- Core: turbulated heavy-duty bar-and-plate, 8 rows
- Fins: high-density multi-louvered
- Application: S54 engine swap into the E36 chassis
- A/C: shorter right side retains factory A/C lines
- Connections: factory S54 OEM oil lines (Euro-spec E36 M3 lines recommended, BMW 17212227235)
- Finish: motorsport silver
- Part number: 8240
Vehicle Applications
Designed for S54 swaps into the following E36 chassis:
- BMW E36 325i / 325is
- BMW E36 328i / 328is
- BMW E36 M3
- BMW Z3
FAQ
What is the CSF 8240?
A race-spec dual-pass oil cooler for BMW S54 engine swaps into the E36 chassis, retaining air conditioning.
Does it keep the A/C?
Yes. The right side is shortened to clear the A/C lines, so it works on cars that keep air conditioning.
What oil lines does it use?
The factory S54 OEM oil-line connections; CSF recommends the Euro-spec E36 M3 lines (BMW 17212227235).
Is there an adapter for custom lines?
Yes. The CSF 8241 is an optional -10 AN adapter fitting kit for custom oil lines.

