do88 Performance Radiator – BMW M2 / M235i / 335i / 435i (F-Series N55, Automatic)

OVERVIEW

The N55 runs hot once it's tuned, and the factory radiator in the M235i, M2, 335i and 435i is sized for stock power. On a track day or in summer traffic coolant temperatures climb and the car starts to protect itself. The do88 WC-290 is a self-developed aluminum radiator that drops in using every factory bracket, the AC condenser, fan shroud and hoses.

It has 23 percent more core volume and 43 percent more coolant capacity than the factory radiator, with a 42 mm two-row core, multi-louvered fins and CNC-machined quick-connect hose fittings. It is for cars with an automatic (or DCT) gearbox; on the 335i and 435i it fits M Sport cars only.

SPECS

• All-aluminum construction with continuous welds
• Dual core, 2 rows, 42 mm thick; multi-louvered 5 mm fins
• Core volume: 8,996 cm³ vs 7,327 cm³ OE — about 23 percent larger
• Coolant volume: 2.5 L (0.66 gal) vs 1.75 L (0.46 gal) OE — about 43 percent more
• CNC-machined hose quick-connects and brackets for the radiator and fan cover
• Fits with all OE brackets, AC condenser, fan cover and hoses
• Replaces OE 17118672103

PARTS INCLUDED

• 1 × do88 aluminum radiator with CNC-machined brackets and quick-connects

TECH RESOURCES

• Required extras: BMW-approved coolant to refill; a diagnostic tool to run the electric water pump bleed routine is recommended. Automatic/DCT cars only; 335i and 435i must be M Sport.
• Installation instructions (do88): WC-290 N55 F-series radiator installation instructions (PDF)
• Installation notes: drain the coolant, remove the front bumper support and the OE radiator, transfer the fan shroud, AC condenser mounts and sensors to the do88 radiator, then refill and bleed.
• Tuning: pairs with the Bootmod3 Tune – BMW N55 (F-Chassis) and MHD Super License – BMW N55 (F-Series).
• Price is for the item only; labor is not included.

PART NUMBER

• WC-290 — do88 Radiator, BMW M235i / M2 / 335i / 435i

VEHICLE APPLICATIONS