INDYCAR: Lotus Submits Mid-Season Performance Upgrade Request

Monday, June 18th served as the one day during the season engine manufacturers can lobby for performance upgrades, which Lotus exercised.

Source: http://auto-racing.speedtv.com/article/indycar-lotus-submits-mid-season-performance-upgrade-request/

Jeffrey Michael Gordon Charles Robert Hamilton IV Charles Robert Hamilton V Kevin Michael Harvick Virgil Ernest Irvan III