do88 Racing Engine Oil Cooler - BMW M3 (E90/E92/E93) 2007-2013

do88 replace the S65 M3's factory oil cooler with a 10 row bar and plate core using a high density offset fin design. Core volume rises to 5247 cm3 against the original 3105 cm3, a 69% increase, and active cooling area to 7728 cm2 against 4858 cm2, a 59% increase, while the cooler itself holds 13.9% more oil. In do88's back to back testing under the same conditions, oil temperature after the cooler dropped from 103°C to 84°C. The oil line connections and brackets are CNC-machined so the cooler drops into the OE brackets and lines without modification.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy