Installation:

1. Open OpenIV
2. Go to GTA V/x64v.rpf/models/cdimages/streamedpeds_players.rpf/player_one
3. create backup of:

feet_diff_004_a_uni.ytd
hand_diff_005_a_whi.ytd
lowr_diff_007_a_uni.ytd
uppr_diff_009_a_uni.ytd

4. Extract files from this zip to a folder
5. Make sure to enable edit mode.
6. Replace these files with the sparco Rally Suit
|
v
feet_diff_004_a_uni.ytd
hand_diff_005_a_whi.ytd
lowr_diff_007_a_uni.ytd
uppr_diff_009_a_uni.ytd

7. Enjoy! :D