Get 100% completion (gold in every race), and purchase at the Shop for 50,000 orbs.
Just as a race is beginning, press X for a speed boost as well as a near full turbo bar.
PSP Daxter Unlockables:If you have Daxter for the PSP, connect it to your Jak X game to unlock the Daxtermobile as well as Kaeden, Osmo, Taryn, and Ximon by scanning for secrets in the Secrets Shop.
To obtain the following characters, complete the indicated task in Adventure mode.
|Daxter||Play for 5 hours, buy in Secrets Shop|
|Kiera||Beat the game|
|Klever||Beat Beachfront Drive Circuit Race|
|Rayn||Finish first in the Blue Cup|
|Razer||Beat Northern Tour Ciruit Race|
|Sig||Beat Spargus City Death Race|
|UR-86||Beat Kras City Qualifier|
|G.T. Blitz||Beat the Game|
|Naughty Dog (car)||Unlocked in the Secrets Shop|
|Pecker||Play for 10 Hours, buy in Secrets Shop|
|Sand Shark (car)||Unlocked in the Secrets Shop|
Unlockables from other Jak games:
|Jak 1||Have a Jak and Daxter save file on your card|
|Jak 2||Have a Jak 2 save file on your card|
|Jak 3||Have a Jak 3 save file on your card|
|Ratchet Skin||Have a Ratchet: Deadlocked Save file on your card.|
Thanks to Revolution reader spongeboy1!