DD2A-4D6D Start with no nitros instead of 6
D42A-4D6D Start with 2 nitros
D02A-4D6D Start with 4 nitros
D62A-4D6D Start with 8 nitros
DC2A-4D6D Start with 10 nitros
C267-CD07 Infinite nitros for Player 1
C2CB-CF0F Infinite nitros for Player 2
C9BD-1F04 Fuel never runs out

After winning a race, money and point displays will show the 
old value, but money and point totals will be updated properly

7430-398E 1st place gives $50,000 instead of $10,000
7430-317E 2nd place gives $50,000 instead of $6,000
7430-318E 3rd place gives $50,000 instead of $4,000
7430-357E 4th place gives $50,000 instead of $3,000
7430-358E 5th place gives $50,000 instead of $2,000
7439-307E 6th place gives $50,000 instead of $1,000
7439-308E 7th place gives $50,000 instead of $0
7439-397E 8th place gives $50,000 instead of $0
7439-398E 9th place gives $50,000 instead of $0
7439-317E 10th place gives $50,000 instead of $0
F039-355A 1st place is worth 20 points instead of 10
F039-35EA 2nd place is worth 20 points instead of 6
F031-305A 3rd place is worth 20 points instead of 4
F031-30EA 4th place is worth 20 points instead of 3
F031-395A 5th place is worth 20 points instead of 2
F031-39EA 6th place is worth 20 points instead of 1
F031-315A 7th place is worth 20 points instead of 0
F031-31EA 8th place is worth 20 points instead of 0
F031-355A 9th place is worth 20 points instead of 0
F031-35EA 10th place is worth 20 points instead of 0
0BC4-49EE + 52C3-3083 Everything is free (must have enough to buy)
DFC5-405E 2nd engine costs $1K instead of $30K
DEC5-405E 2nd engine costs $15K instead of $30K
DFC5-40EE 3rd engine costs $1K instead of $50K
FBC5-40EE 3rd engine costs $25K instead of $50K
DFC5-495E 4th engine costs $1K instead of $80K
46C5-495E 4th engine costs $40K instead of $80K
DDC5-415E 2nd wet tires are free
DDC5-41EE 3rd wet tires are free
DDC5-455E 4th wet tires are free
DDC6-405E 2nd dry tires are free
DDC6-40EE 3rd dry tires are free
DDC6-495E 4th dry tires are free
DFC6-415E 2nd gear box costs $1K instead of $10K
D9C6-415E 2nd gear box costs $5K instead of $10K
DFC6-41EE 3rd gear box costs $1K instead of $30K
DEC6-41EE 3rd gear box costs $15K instead of $30K
DFC6-455E 4th gear box costs $1K instead of $50K
FBC6-455E 4th gear box costs $25K instead of $50K
DFCB-405E 2nd nitro costs $1K instead of $5K
D4CB-405E 2nd nitro costs $2K instead of $5K
DFCB-40EE 3rd nitro costs $1K instead of $15K
D5CB-40EE 3rd nitro costs $7K instead of $15K
DFCB-495E 4th nitro costs $1K instead of $30K
DECB-495E 4th nitro costs $15K instead of $30K
DFCC-405E 2nd side armor costs $1K instead of $5K
D4CC-405E 2nd side armor costs $2K instead of $5K
DFCC-40EE 3rd side armor costs $1K instead of $10K
D9CC-40EE 3rd side armor costs $5K instead of $10K
DFCC-495E 4th side armor costs $1K instead of $20K
DCCC-495E 4th side armor costs $10K instead of $20K
DFCC-415E 2nd rear armor costs $1K instead of $5K
D4CC-415E 2nd rear armor costs $2K instead of $5K
DFCC-41EE 3rd rear armor costs $1K instead of $10K
D9CC-41EE 3rd rear armor costs $5K instead of $10K
DFCC-455E 4th rear armor costs $1K instead of $20K
DCCC-455E 4th rear armor costs $10K instead of $20K
DFC8-405E 2nd front armor costs $1K instead of $5K
D4C8-405E 2nd front armor costs $2K instead of $5K
DFC8-40EE 3rd front armor costs $1K instead of $10K
D9C8-40EE 3rd front armor costs $5K instead of $10K
DFC8-495E 4th front armor costs $1K instead of $20K
DCC8-495E 4th front armor costs $10K instead of $20K