NEW money cheat!
Ok, so you go to the "Buy Upgrades" screen and select a category, any one. You then select an upgrade area (i.e. Exhaust, Engine Block, Cams/Valves, etc.)
Select the cheapest(first)upgrade, NOT THE STOCK UPGRADE! Press Right trigger and fast afterward A so it asks to buy the part, but your selected part is the most expensive one. Hit "Yes", and you'll buy the Racing level part fot the price of the Street level part! I discovered this, and please rate! 8)
*Note, this ONLY works if there are more than 1 part upgrade, and ONLY if you haven't already bought the last upgrade.*
Added by: JDLENL9999 Dec 31st 2009, ID#5317