Component to Improve Aerodynamics of a Car

This page is the CodyCross answer for the clue below from Treasure Island, Group 1040, Puzzle 2 (Haul of Jewels).

Question is: Component to Improve Aerodynamics of a Car

and the answer is: DIFFUSER

Word Meaning:

DIFFUSER — comparative form of diffuse: more diffuse

Definitions from Wiktionary.