Locked boost is a boost type created for a single vehicle within the Boost Specials pack for Burnout Paradise. As soon as the player presses the boost button the vehicle gains a permanently full boost bar that does not diminish with use and is always available. Once ignited the boost is excreted in the form of a blue flame from the vehicle's exhausts.
The only car currently equipped with Locked boost is the Carson Extreme Hotrod.
Vehicles equipped with Locked boost