Greater power gains are achieved with a larger high performance intercooler. The Dinan intercooler provides an increase in total volume, substantially reducing the pressure drop by 0.7 psi, as well as providing more efficient heat exchange. “Cool down” time is also reduced, enabling the cars to produce full power under varying driving conditions such as stop and go traffic. The system has been engineered as a direct replacement for the stock unit, requiring only minor modifications for a clean, factory-like installation. The intercooler also features larger connector tubing and custom shrouding for maximum efficiency. The improved thermal efficiency will also enhance turbocharger reliability. The intercooler may also be used in conjunction with the Dinan oil cooler and Stage 3 Engine Software with increased boost pressure to take advantage of the improved intercooler efficiency.