Police in West Vancouver have seized two high-end cars after they say a pair of teenagers was caught racing on a mountain road.

The two 17-year-old novice drivers of a newer model Porsche and BMW were recorded travelling at 143 kilometres per hour in a 60-kilometre zone of the winding Cypress Bowl Road Friday morning.

Officers say the BMW's driver sped away from police, while the driver of the Porsche pulled a U-turn and fled in the opposite direction.

The BMW ended up in a ditch with more than $15,000 in damage, while the Porsche was found at a school nearby.

Both cars have been impounded for street racing, and the two young men are now prohibited from driving for 15 days. They also face possible charges of excessive speeding and failing to stop for police.

The incident comes just two days after 13 drivers under the age of 21 saw their luxury cars impounded after a street race on Highway 99.

Witnesses reported seeing the vehicles – including Ferraris, Maseratis and Lamborghinis – zoom through Metro Vancouver at speeds of up to 200 kilometres per hour before police found and seized them in Surrey and White Rock on Wednesday.