The following are known Action Replay Codes for Downforce on Nintendo Game Boy Advance (GBA).

These are Action Replay Version 3 (V3) Codes.

The codes should work with the region specified but may work for other regions as well.

(m)
ef665a5a
eabd1b95
09c15ba8
e989d3d9

Always first
ca3995a4
7705c3d0

Super Speed
3b07bf4f
326a3fdf

All Difficulties
35374c10
e78fe8dd