Acceleration SS engine
Finish any track in Class AA in first, second or third place with the Lights 2 extra and the Missile 2 weapon equipped.

Bumper S part
Finish the Ruins track in Class A in first, second or third place without driving on the grass.

Spoiler 4 part
Finish the Alpine track in Class A in first, second or third place without using a Dash Zone.

Air Duct extra
Finish any track in Class A in first, second or third place thirty times in the same game session.

Light extra
Finish the Lakeside track in Class A in first place.

Nozzle extra
Finish any track in Class A in first, second or third place without using a non-hidden power-up..

Better weapons, extra points, class advancement
Win a medal on each level in a class (C, B, or A) to earn extra points, better weapons, and advancement to the next class (B, A, or AA).

Top End S engine
Finish any track in Class A in first, second or third place with one of the lap times ending in "99".

Top End SS engine
Finish the Harbor track in Class A in first, second or third place with one of the lap times less than 42 seconds.

Acceleration S engine
Finish the Caves track in Class A in first place.