well if you ever go faster then 100mph, your hood starts to wobble. they were originally used to keep your hood from wobbling or even falling off because i had a friend whos hood crack because of t he wabbling and it was carbon fiber which has no weight to it. the high speends made it wobble to much, it cracked bad and t hey are expensive so it like used to keep it locked in position for racer. NOW lol no one uses it for that since i see civics with under 200 hp with it, not its more for show and design but most ppl who race have them