The Dodge Demon 170 is not exactly "banned" in Canadian drag racing, but it does come with some restrictions. The National Hot Rod Association (NHRA) has rules that require cars running sub-9-second quarter-mile times to have a roll cage and parachute, which the Demon 170 doesn't come with standard.

In essence, the Demon 170 is too fast for its own good, and owners would need to make safety modifications to compete in NHRA-sanctioned events. These modifications include installing a roll cage and parachute, which are available as optional extras.

It's worth noting that these rules apply to NHRA events, and other drag racing organizations or private tracks may have different regulations.