The phrase "carbon splitter" refers to a technology or device that helps separate and reduce carbon dioxide, a harmful greenhouse gas, from the environment. Full definition
The Volante closely followed the coupe with carbon splitter, carbon diffuser and the powerful carbon ceramic brakes. (astonmartins.com)
There's a bit of aero tweakery too, but it's unlikely that a funky carbon splitter or venturi at the rear will make any discernable difference unless you happen to drive it over a very high cliff. (evo.co.uk)
As with the coupe, there's an exposed carbon splitter, side skirts and rear diffuser, Aston Martin going to great lengths to ensure the visible carbon weave flows in one direction. (evo.co.uk)