DESCRIPTION
Upgrade charge-air cooling with the do88 Intercooler. ICM-470 fits Porsche 911 Turbo 3.3L (930) 1978–1989.
Taking performance to the next level while preserving classic elegance – the do88 Long-Neck Intercooler Kit for Porsche 930 Turbo.
Intercooler Features:
- Massive cooling performance improvements while maintaining an authentic 1980s appearance.
- Long-neck style intercooler with direct connection to the throttle body, eliminating the original air bypass valve system.
- One of the most comprehensive and well-thought-out intercooler kits available for the Porsche 930 Turbo.
- Complete kit – everything required for installation is included.
- No cutting or permanent modifications required; the car can be returned to stock at any time.
- Compatible with the original air filter box – no modifications needed.
- Fits with factory AC condenser – no AC removal required.
- Compatible with the rear window wiper motor.
- Removes the large OE diverter valve and replaces it with a modern GFB diverter valve.
- Includes components for compatibility with both T26 (OE) and T27 (upgrade) turbochargers.
- Direct fit with original hoses and sensor connections.
- Preserves the classic, clean appearance of the engine bay.
- Improved airflow: +11% increase.
- Lower post-intercooler air temperature under identical conditions: 40°C vs. 69°C – 29°C reduction.
- High-quality powder-coated finish for durability and aesthetics.
Background
Owners of the iconic Porsche 930 Turbo often aim to increase performance while preserving the car’s timeless design. The intercooler is a highly visible component in the engine bay, yet many aftermarket alternatives compromise the car’s aesthetics with bulky, box-shaped sheet metal tanks that detract from its original elegance.
The do88 Solution
When developing this intercooler for the Porsche 930 Turbo, do88 set out to retain the classic 1980s appearance while delivering a substantial improvement in performance. The result is an intercooler that offers superior cooling efficiency and reduced pressure drop compared to both the OEM unit and most aftermarket alternatives.
The intercooler features a motorsport-grade Bar & Plate core with a 90 mm thickness. Its densely packed cooling fins ensure excellent heat transfer while minimizing pressure drop.
To support both T26 (OE) and T27 (upgrade) turbochargers, the kit includes two silicone hoses that replace the original aluminum charge pipe between the turbocharger and the intercooler inlet.
The factory diverter valve system on the 930 Turbo is large, heavy, and slow to react, often leading to drivability issues and sluggish throttle response. The do88 Long-Neck intercooler eliminates this OE system entirely. By connecting the intercooler outlet directly to the throttle body—a design also used on the 930S and 964 Turbo—response and reliability are significantly improved. The OE valve is replaced with a modern GFB diverter valve included in the kit.
The intercooler is also designed to work seamlessly with the original deck-lid-mounted AC condenser, ensuring that air conditioning functionality is retained.
This kit is ideal for both standard and high-power builds and is engineered to be installed without permanently modifying the vehicle. All necessary brackets, hardware, hoses, and fasteners are included.
Installation
The do88 intercooler is designed as a direct-fit solution for all Porsche 930 3.3 Turbo models. Due to the hand-built nature of these vehicles, minor adjustments may occasionally be required to achieve perfect alignment. These adjustments are minimal and do not compromise the car’s originality, appearance, or reversibility.
OE Reference Numbers
93011023307
93011015804
93011019201
93011022302
93011013702
93011015801
93011001803
93011017101
99923900940
Vehicle Fitment
Model: orsche 911 Turbo (930)
Model years: 1978–1989
Engine: 3.3 Turbo
TECHNICAL DETAILS
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