After extensive research, HKS noticed that the stock intercooler in the Civic Type-R was simply insufficient to handle the pressure generated by the K20C turbocharged engine. This was leading to engine intake temperatures rising to nearly 90°C.
The newly designed HKS Civic Type-R intercooler core is 100mm wide and has a capacity roughly 200% greater than the stock intercooler. This large core has shown an overwhelming increase in cooling performance.
They also saw that the stock intercooler piping layout had a sharp bend, so the intake air did not flow smoothly and lead to boost pressure loss. They've answered this by integrating a superior piping design to realize smooth air flow and reduce this loss.