A spoiler extension is when additional information is given about a story that could ruin the surprise or suspense for someone who hasn't finished watching or reading it yet. Full definition
Accessory Aero Kit Front Airdam, Side Air Dam, Rear Airdam, Brake Air Guides, Rear Spoiler Extension $ 1,999.00 ACY (thetorquereport.com)
The rear spoiler extension pops a bit higher when deployed as a complement to this tweak, reducing lift on both the front and rear axles. (digitaltrends.com)
PASM SPORT SUSPENSION - inc: (20 mm lower) two manually selectable modes «Normal» and «Sport» aerodynamically adapted front spoiler lip and higher rear spoiler extension (dupontregistry.com)