JZZ30 Soarer (Early/Middle Model) Intercooler Kit

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spec.S: Street to Sports Driving Model 
spec.R: Cooling-Focused, Low Pressure Loss, High-Output Model

Kit Contents
Intercooler Assembly
Silicone Hoses
Dedicated Aluminum Piping
Hose Clamps
Short Parts for InstallationAir Cleaner
 
Notes
Exclusively for Zenki (Early) and Chuki (Mid) model Twin-Turbo vehicles.
In case of interference, some modifications to the bumper, reinforcement, or body may be required.
 
What is spec.S?
Compatible from stock turbines to boost-up specifications An entry-level model designed not only to improve cooling performance for spirited driving but also to maintain optimal performance when used as a direct replacement for the stock unit.
Reduced Pressure Loss = Improved Response While ensuring the response performance required by boost-up users, the inner offset fins realize stable intake temperatures.
 
What is spec.R?
Enhanced Cooling Efficiency = Improved High-Output Performance Cooling efficiency—the most critical factor for an intercooler—varies based on core and tank size, tube/fin shape, intake airflow, and dwell time.
By optimizing the side tanks, cooling fins, and tube geometry, spec.R successfully achieves superior cooling performance and stable intake temperatures.
Compared to the conventional spec.S, we have repeatedly tested and refined various shapes to ensure that compressed air flows balanced into the core tubes.
This improvement in cooling directly translates to increased power.
The Relationship Between Pressure Loss and Cooling Efficiency To improve cooling performance, it is necessary to let air dwell longer in the tubes and expose the fins to more ambient airflow.
However, simply increasing tube size to hold more air increases pressure loss, leading to poor throttle response.
Conversely, if air passes through too quickly, response improves due to lower pressure loss, but cooling performance drops.
 
Thus, pressure loss and cooling efficiency are in a trade-off relationship.
In extreme cases, one must choose between response or cooling based on the driving stage and desired specs.
HPI’s Development Concept The spec.R is designed for all stages, from street to circuit.
It is a high-performance model that balances cooling and response at a high level, compatible with everything from stock setups to boost-up and large-capacity turbines.
 
It delivers stable cooling even in severe conditions—such as continuous track laps where intake temperatures skyrocket or situations with low airflow—allowing the vehicle to unleash its true potential beyond factory limits.
Since ECU tuning significantly affects output characteristics, re-mapping the fuel, ignition, and electronic controls to match the spec.R's cooling effect will enable even higher power gains.