do88 Front Intercooler Radiator – BMW M2 / M3 / M4 (G87 / G80 / G82, S58)

OVERVIEW

The S58's water-to-air charge cooler is only as good as the front-mounted radiator that cools its coolant. On a tuned car driven hard — a track session or back-to-back pulls — that small factory heat exchanger heat-soaks, intake temperatures climb and the ECU pulls power. The do88 WC-430 replaces it with an all-aluminum unit that has 39 percent more core volume and runs the coolant through four passes instead of two.

The two-row, 48 mm core adds about 9 percent more active cooling area while a 5 mm fin height keeps air moving through to the engine radiator behind it. Tanks are TIG-welded, the ports CNC-machined, and there is no plastic anywhere. The system holds about 1.4 liters more coolant than stock, and do88 supplies custom rock guards. It fits both automatic and manual cars.

SPECS

• All-aluminum construction, TIG-welded end tanks, CNC-machined ports — no plastic
• Core volume 39 percent larger than OE
• Two-row core, 48 mm thick; about 9 percent more active cooling area
• Quadruple-pass coolant flow (OE: two-pass)
• 5 mm fin height (OE: 4.4 mm) to preserve airflow to the engine radiator
• Holds about 1.4 L more coolant than OE (about 3.6 L total system)
• Custom upper and lower rock guards included
• Fits automatic and manual transmission cars
• Replaces OE 17118095283

PARTS INCLUDED

• do88 performance charge cooler radiator
• Upper rock guard
• Lower rock guard (manual-gearbox cars)

TECH RESOURCES

• Required extras: coolant for the low-temperature (charge cooler) circuit — about 3.6 L total system capacity. Hose pinch-off pliers help during bleeding.
• Installation instructions (do88): WC-430 S58 front intercooler radiator installation instructions (PDF)
• Installation notes: remove the bumper cover fasteners, fan shroud, radiator support covers, undertray and lower lip. Drain the circuit, disconnect the upper and lower hoses, release the OE radiator from its supports, then fit the do88 unit and rock guards and refill while reconnecting the hoses.
• Bleeding: bleed the charge-cooler circuit with the factory routine. Trapped air causes high intake temperatures and intermittent A/C; repeat if needed.
• Instructions are shot on an M2; some models need the full bumper cover removed to reach the lower rock guard screw.
• Tuning: no tune is required; most useful on tuned cars. Pairs with the Bootmod3 S58 Tune and MHD Super License – S58.
• Price is for the item only; labor is not included.

PART NUMBER

• WC-430 — do88 Front Intercooler Radiator, BMW M2 M3 M4 G80 G82 G87 (S58)

VEHICLE APPLICATIONS