Do88 Intake Manifold | BMW S58

The do88 Charge Cooler Manifold is a comprehensive intake and charge-air cooling upgrade developed for high-performance BMW S58 applications.

The factory S58 intake manifold integrates the charge cooler directly into its thermoplastic construction. While effective at factory power levels, increased boost, repeated high-load driving and substantial power upgrades can expose limitations in both cooling performance and durability.

do88 addresses these limitations with an extensively engineered cast-aluminium intake manifold featuring a 127 mm (5”) Bar & Plate air-to-water charge cooler core, increased airflow, integrated auxiliary port injection provisions and additional ports for advanced engine setups.

High-Performance Bar & Plate Charge Cooler

At the centre of the manifold is a 127 mm (5”) thick Bar & Plate air-to-water intercooler core, designed to improve both charge-air cooling and airflow.

The core is approximately 62% larger than the factory unit, with carefully developed air and water fin configurations designed to balance heat transfer with minimal airflow restriction.

According to do88’s testing, the manifold achieved:

• 28.5°C intake temperature, compared with 33°C using the OE charge cooler manifold
• 511 CFM airflow at 0.05 bar / 0.73 psi pressure drop, compared with 422 CFM for the OE manifold
• Approximately 21% higher airflow under the stated test conditions

CFD-Developed Cast Aluminium Construction

Rather than simply machining an aluminium replacement for the factory manifold, do88 developed purpose-designed cast end tanks to optimise the distribution of both charge air and cooling water across the core.

Development included 3D scanning, SolidWorks design, Computational Fluid Dynamics (CFD), multiple design iterations and 3D-printed prototypes before the final design was produced.

The resulting aluminium construction also provides a significantly more robust solution for engines operating at elevated boost pressures compared with the factory thermoplastic manifold.

Integrated Auxiliary Port Injection

The outlet tank is prepared from the factory for six auxiliary port fuel injectors, making the manifold particularly suitable for higher-power S58 builds requiring additional fuel delivery.

A custom fuel rail with female AN-8 connections is included and is designed for use with compatible injectors including:

• Injector Dynamics ID1050x-34-14 / ID1050x-34-14-14
• Bosch EV14 short-style injectors

For vehicles not running port injection, injector blanking plugs are included.

Nitrous & Methanol Injection Ready

Each individual cylinder runner incorporates its own 1/8” NPT port, allowing additional functionality for setups using nitrous or methanol injection.

Sealing plugs are supplied for vehicles where these ports are not required.

Additional Sensor & Vacuum Ports

An integrated three-port pad is cast into the side of the outlet tank, providing three additional 1/8” NPT connections.

These can be used for additional sensors, data acquisition or as supplementary vacuum sources depending on the vehicle’s configuration.

Sealing plugs are included.

Advanced Thermal Management

Because aluminium transfers considerably more heat than the factory plastic manifold, do88 includes a purpose-designed thermal barrier spacer between the cylinder head and intake manifold.

The spacer helps reduce conductive heat transfer into the manifold, supporting lower intake-air temperatures and reducing heat soak during sustained high-load operation.

Custom high-specification FKM-silicone O-rings sit within precision-machined grooves to provide a secure seal between the cylinder head, thermal barrier and manifold.

A total of 12 custom O-rings are supplied.

Key Features

• 127 mm / 5” Bar & Plate air-to-water charge cooler core
• Approximately 62% larger core than OE
• Cast-aluminium intake manifold construction
• CFD-developed airflow and coolant distribution
• 511 CFM at 0.05 bar / 0.73 psi pressure drop in do88 testing
• Approximately 21% greater airflow than OE under the stated test conditions
• Integrated auxiliary port injection provisions
• Custom fuel rail with female AN-8 connections included
• Injector blanking plugs included
• Six individual 1/8” NPT runner ports for nitrous or methanol injection
• Three additional 1/8” NPT sensor/vacuum ports
• Thermal barrier spacer included
• 12 custom FKM-silicone sealing O-rings included
• Retains convenient access to the spin-on oil filter for servicing
• Required mounting brackets and associated installation hardware included
• Plug-and-play design for compatible applications

Vehicle Fitment

Designed for compatible BMW S58-powered G8X applications, including:

• BMW G87 M2
• BMW G80 M3 / M3 Competition
• BMW G81 M3 Touring / M3 Competition Touring
• BMW G82 M4 / M4 Competition
• BMW G83 M4 Convertible / M4 Competition Convertible

Vehicle specification and existing modifications should be confirmed before ordering.

Important Information

This product is intended for performance use and should be installed by a qualified professional.

It is the customer’s responsibility to ensure compatibility with their specific vehicle prior to purchase. If you are unsure, please contact us before ordering.

Gridline Custom Motorsports is not responsible for issues arising from incorrect installation, misuse, or improper product selection.

Due to the nature of performance parts, some items may be special order and subject to supplier availability and lead times.