CSF Race-Spec Transmission / Oil Cooler for BMW E9x M3 & 335i

An oil cooler for the BMW E9x M3 and 335i: on a DCT M3 it cools the gearbox oil, on the manual M3 the engine oil, and CSF also list it for the 335i. The dual-pass core has 11 cooling tubes in a single-row, 22 mm microtube made with CSF's air-con condenser technology, the fins have 20% more surface area than the original, and CSF's lab puts it at about 30% more efficient.

• Gearbox oil cooler (DCT M3) or engine oil cooler (manual M3)
• Dual-pass, 11 cooling tubes (original: 10)
• 20% more fin surface area
• About 30% more efficient (CSF's lab)

Fitting notes

• Drop-in fit: no modifications, using the original line connections, brackets and ducting

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