Merc Racing High Capacity Heat Exchanger Upgrade, Audi 3.0T/4.0TThe Audi air to water cooled turbo and supercharged applications required an advanced configuration that further expanded on their cooling system and addressed higher cooling capacity and water volume than any other product. We took this challenge seriously and with our help from Audi owners friends, we now provide you a cooling solution that performs amazingly on your stock, upgraded or higher boost tuned applications. Our unique patented design uses