Bonus Cars 
from Jark87@aol.com via Sega Sages 
There are tons of bonus cars in the game. To get them you must beat the Basic or Pro Series on Arcade Mode. For example, if you beat the Basic Series on Expert you will get a set of cars or if you beat the Pro Series on Normal you get another set. To get the first sets you must beat every arcade mode scenario. To get the other secret cars which are the best in the game, you must beat Championship Mode on both Normal and Expert Settings. 
The bonus cars are: 
1. Ferrari Testorosa
2. Porsche 959
3. Vector
4. Dodge Viper
5. Bugatti EB110
6. Ferrari F50
7. More Lamborghini'

Reverse Tracks
By: Andrew 
Beat the Championship Mode in Novice and Expert difficulty levels, and you will recieve reverse tracks. 

Shortcuts
By:Mark Owens 
First when you see a tunnel take it, it shaves some of your time. When you get to the land bridge stop (TRY THIS IN TIME TRIAL MODE FIRST SO YOU CAN GET USED TO IT)and turn to the left,you should see some grass leading up to a bolder drive into the bolder. (You should go through it.). This is more of a trick than a short-cut,(well it can be if you know how to navagate it.) when near the end of the course you should see a tree. Steer left of the tree. You're on a dirt road! 

Bay track
(with the tanker in the water) - Start the race, then after the first 4 or 5 curves, you will come to a long bridge that gradually rises. At the top, is a sharp turn right, then you run into a t-junction and it tells you to turn sharp left. You can go right here, and save a few seconds, but either way you go you end up going around the building and continuing straight. As soon as you get to the track on the other side of the building, look on the right wall for a yellow iron gate. Drive into the gate and take a right, then a left turn. When you turn left, keep turning until you see a dark grey iron gate just like the yellow one, and drive through it, then turn right once you get out to continue on the normal track. This will most likely put you in 1st if done quickly. 

Bonus Cars
By: Martin Battaglino, ogami@webtv.net, and Andrew 
There are four bonus cars in the game. To get them you must beat the Basic or Pro Series on Arcade Mode. Like example if you beat the Basic Series on Expert you will get a car or if you beat the Pro Series on Normal you get another car. There are 6 different cars to get. To get the first four you must beat every arcade mode scenario. To get the other 2 secret cars which are the best in the game, you must beat champoinship mode on both normal and expert. 

The bouns cars are:
1. Ferrari Testorosa
2. Porsche 959
3. Vector
4. Dodge Viper
5. Bugatti EB110
6. Ferrari F50