One of Mezzo's main microtube applications is the automotive racing radiator. Starting in 2014, Mezzo’s IndyCar radiator was approved for use in the IndyCar racing series on Dallara’s DW12 race cars. Teams could elect to use the Mezzo microtube radiator as a drop-in replacement which helped to remedy overheating and debris-fouling issues that plagued the existing tube and fin radiators. In fact, when fitted with a Mezzo microtube radiator on a hot track day, teams saw up to 8°C lower engine temperatures compared to the stock radiator.