do88 Charge Cooler Manifold – BMW M2 / M3 / M4 / X3 M / X4 M (G87 / G80 / G82 / F97 / F98, S58)

OVERVIEW

The S58 cools its charge air inside a plastic intake manifold with an integrated water-to-air cooler. On a tuned car, and especially on track, that cooler heat-soaks and the plastic plenum becomes a limit on boost. The do88 ICM-450-K replaces the whole assembly with an aluminum manifold built around a 127 mm (5") thick bar-and-plate charge cooler core, about 62 percent larger than stock.

The end tanks were developed with 3D scanning, CFD and printed prototypes, and a thermal barrier spacer cuts heat transfer from the cylinder head. do88 measured 28.5 °C intake air temperature against 33 °C for the OEM manifold, and 511 CFM against 422 CFM at the same pressure drop. It is also set up for bigger builds: a sensor pad with three 1/8" NPT ports, a 1/8" NPT port on every runner for methanol or nitrous, and an outlet tank prepared for auxiliary port injection with the AN-8 fuel rail included. The spin-on oil filter stays accessible with the manifold installed.

SPECS

• Aluminum intake manifold with cast end tanks; replaces the OE plastic manifold
• Bar-and-plate air-to-water charge cooler core, 127 mm (5") thick — about 62 percent larger than OE
• Thermal barrier spacer between manifold and cylinder head
• 12 custom FKM-silicone O-rings in machined grooves
• Intake air temperature: 28.5 °C vs 33 °C OEM (do88 testing)
• Airflow at 0.05 bar pressure drop: 511 CFM vs 422 CFM OEM — about 21 percent more
• Sensor pad with three 1/8" NPT ports; 1/8" NPT port on each runner (plugs included)
• Auxiliary port injection ready: AN-8 fuel rail included; suits Injector Dynamics ID1050x or Bosch EV14 injectors
• Oil filter accessible without removing the manifold
• Replaces OE 17518092584

PARTS INCLUDED

• do88 charge air cooler / intake manifold
• Thermal spacer and 12 × FKM sealing rings
• Brackets: front wire harness, rear wire harness, water hose; engine cover mounting tab
• Silicone water hose, rubber EVAP hose and quick-connect water hose joiner
• Fuel rail with 2 × blanking plugs; 6 × injector plugs with 6 black and 6 brown O-rings
• EVAP blanking plug with O-ring, plastic EVAP blanking
• Hardware: 7 × M6×30, 2 × M6×20, 2 × M6×12, 2 × M6×12 low head, 3 × M6×45, 1 × M5×20, 9 × M5×12, 9 × M6 spring washers, 2 × nylon washers
• 4 × hose clamps, silicone caps (2 × 4 mm, 2 × 18 mm), zip-tie and 5 cm adhesive foam strip

TECH RESOURCES

• Required extras: charge-cooler (low-temperature circuit) coolant to refill after installation, thread locker for the thermal spacer low-head screws, and lubricant for the O-rings.
• Required for the optional port-injection setup: injectors such as Injector Dynamics ID1050x plus fuel supply and a tune that controls them — Bootmod3 S58 Tune or MHD Super License – S58.
• Installation instructions (do88): ICM-450-K S58 charge cooler manifold installation instructions (PDF)
• Installation notes: engine cold and battery negative disconnected. Remove the strut braces, engine and ECU covers, ECU support, intake, harnesses, EVAP parts, expansion tank, coolant hoses and throttle body, and lift the OE manifold off as one unit. Fit the EVAP valve, hoses, thermal spacer, throttle body, water hose and sealing rings to the do88 manifold, then lower it so the locating pins seat in the head (a tight fit).
• Torque: manifold flange M6×30 screws in sequence from the center — 5 Nm twice, then 10 Nm twice, then verify all at 10 Nm.
• Bleeding: refill and bleed the charge-cooler circuit with the factory bleed routine. Trapped air shows up as high intake temperatures and intermittent A/C; repeat the bleed if needed.
• Instructions are shot on an M2 G87; panel removal differs on the M3, M4, X3 M and X4 M.
• No CARB EO is published for this part — off-road / competition use only in California.
• Price is for the item only; labor is not included.

PART NUMBER

• ICM-450-K — do88 Charge Cooler Manifold, BMW M2 M3 M4 G80 G82 G87 / X3 M X4 M F97 F98 (S58)

VEHICLE APPLICATIONS