Full list of all 27 Import Tuner Challenge achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Won 100 Xbox Live Races…SUGOI!
Won 50 Xbox Live Races.
Won 10 Xbox Live Races.
Defeated ???.
Won your first Xbox Live Race.
Defeated King Speed.
Defeated Crimson Devil.
Defeated White Charisma.
Defeated Melancholy Angel.
Defeated D3.
Defeated Snake eyes.
Defeated a Phantom 9 member.
Defeated Silent Cassiopeia.
Defeated Skull Bullet.
Defeated Azure Sniper.
Raced the All clockwise roads under 16'30"000.
Raced the C1 outside under 5'00"000.
Raced the Shin Kanjo counter clockwise under 6'00"000.
Raced the Shinkanjo clockwise under 6'00"000.
Raced the Shinjuku 4 under 6'00"000.
Raced the All counter clockwise roads under 16'30"000.
Defeated Garnet Dawn.
Defeated Platinum Prince
Raced the C1 inside under 5'00"000.
Raced the Shibuya 3 under 3'30"000.
Defeated Midnight Cinderella.
Defeated Bloodhound.