Air flowing over an intercooler can absorb some heat, but air and water flowing over the intercooler surface can absorb even more. A platform shift and upgraded powerplant were along for the ride, complete with an upgraded intercooler and the latest three-nozzle version of the earlier intercooler spray system. For Subaru, the ability to spray the intercooler surface on demand was particularly beneficial in combating the performance-robbing heat-soak effect. Subaru added a "large water reservoir for the intercooler water spray," which equipped its Group N rally teams with a 12-liter water tank in the trunk. Old Tricks For Modern Heat: Why (And How) Porsche And BMW Kept Spraying2017 Porsche 911 GT2 RS PorscheBy the late 2000s, the intercooler spray era was winding down.