The do88 engine oil cooler is a bolt-in replacement for the factory unit on the E46 BMW M3 and M3 CSL, built to control S54B32 oil temperatures during track and endurance driving. Core volume is 185% larger at 3276 cm3 versus the OEM 1148 cm3, active cooling area grows 50% to 575 cm2 from 383 cm2, and the cooler holds 0.70 liters of oil against 0.39 liters stock. CNC-machined connections and brackets let it mount to the OEM oil lines with no modification, and installation instructions are included.
| Type | Engine oil cooler |
| Position | Engine oil circuit |
| Core Volume | 3276 cm3 (vs 1148 cm3 OEM, +185%) |
| Cooling Area | 575 cm2 (vs 383 cm2 OEM, +50%) |
| Oil Capacity | 0.70 L (vs 0.39 L OEM) |
| Installation | Drop-in; uses OE lines and brackets |
| Part Number | OC-150 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2000-2006 | BMW | M3 | S54B32 (E46) |
| 2003-2004 | BMW | M3 CSL | S54B32 (E46) |
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