Neons are a selection of visual upgrades featured in Need for Speed: Underground 2 that can be applied as an underglow neon, engine neon, and trunk neon. Each neon colour is also available with a 'Pulse' blinking animation. * Underglow Neon is available from the beginning and is applied to the underside of a vehicle. * Engine Neon is available once the player has fitted Extreme Engine, ECU, and Turbo package upgrades. * Trunk Neon can only be applied to the 'Custom' Trunk Layout.