Collect the five hidden Derelict car parts for a Derelict car to unlock it. Each Derelict car requires you to have defeated a different league boss. After defeating a league boss, you will get clues for the five Derelict car part locations of a certain car. In the map menu, select the "Derelict" tab to view the clues. It shows a drawing with outlines of the streets where the Derelict parts are located. You normally would have to look at the in-game map and compare it with the drawing, but the videos below show all the Derelict part locations. The Derelict cars are special because they can be upgraded to the maximum level without the level caps normal cars have. After upgrading a Derelict car to Performance Level 300, it unlocks a Super Build for more extreme visual customization. After restoring a Derelict car, you can also choose which category you want it to be (Race, Drag, Drift, Runner, or Offroad). It is recommended you choose a different category for each unique car. None of the Derelict car parts are missable, but they will not spawn until you have defeated the corresponding league boss.
Easy money, REP, and Speed cards
To get a lot of money, REP and Speed cards quickly, complete short events. Since all events give almost identical rewards regardless of the difficulty, just keep repeatedly completing the shortest events. The fastest event in the game is the "Drifting The Block" drift trial. It becomes unlocked early in the game, when you do drift trials for the first time. It is the perfect farming spot for money, REP, and Speed cards. This event can be completed in 90 seconds, and since it is a circle, you finish at the start and can instantly replay it. Each time you finish the drift trial, you will get approximately 12,000 credits (17,000 credits if you sell the Speed card), 120,000 REP, and a Speed card. You can get approximately 3,600,000 REP and 510,000 credits per hour using this method. Keep replaying the "Hyperspace Circuit" race. It becomes unlocked during the final act, at the end of the game. It gives 31,000 credits (if you sell the Speed card), 144,000 REP, and a Speed card. The event only takes three minutes to complete, including loading times and transition screens (with a fully upgraded car). It also immediately puts you back at the start of the event. You can get approximately 2,880,000 REP and 619,980 credits per hour using this method.
Front Bumper visual customization
Drift for 8 seconds to unlock the Front Bumper visual customization. Buy a drift car, and go to the airport. It is easy to drift for 8 seconds on the runway at the airport.
Three stars on "Eject Button" Jump challenge
The "Eject Button" Jump challenge is one of the hardest jumps in the game, and requires a car that is made for jumping and some practice and luck with the ramp. A good car to use is the Porsche Panamera Turbo with the Offroad build. Mainly go for jump speed cards. These will increase your airtime, and you should get it above nine or even close to ten. The "Eject Button" Jump is especially difficult because you have to hit top speed while going against traffic and squeezing through a narrow spot to hit the ramp. This takes some practice.