1. Grind Grind Grind Grind Grind...until you have about 3000 part tokens.
2. Go buy the 'catch up pack'...no sense getting less than the lvl 16 cards.
3. Go to that stupid slot machine...run your car up to lvl 18/399.
4. Now keep spinning the slot machine until you match all the cards to whichever speed group you like...changes for each style of racing you're doing.
5. Now keep spinning the slot machine until you get all the perks on all the same manufacturer that you're looking for...personally I choose the Accel, Speed, Nitros perks.
6. If you haven't gone insane by now, go race your badacre car...trust me...my Boss 302 Mustang set up like I've just lined out is truly an "In this game" badacre.