Three men have been charged after a dramatic police chase led to the discovery of an alleged “kill car” in Western Sydney.

The trio were allegedly travelling in a stolen Audi when officers attempted to stop the vehicle on the Great Western Highway at Wentworthville about 2.25pm on Saturday.

When the driver failed to stop, a pursuit was initiated across multiple suburbs.

During the chase, police allege the men threw jerry cans from the vehicle onto the M4 Motorway near Silverwater.

The pursuit came to an end on Hill Road in Lidcombe, where officers from the Raptor Squad rammed the Audi, forcing it to stop.

All three men were arrested after a foot chase.All three men were arrested after a foot chase. Credit: 7NEWS The pursuit was initiated across multiple suburbs. The pursuit was initiated across multiple suburbs.  Credit: 7NEWS

The three men then fled on foot.

Police, with the assistance of PolAir and the Dog Squad, tracked the men down and arrested all three after a foot chase.

The men — one aged 28 and two aged 24 — were not injured.

Police said the Audi had been stolen from a home in Edmondson Park last month and described it as a “kill car”.

A search of the vehicle allegedly uncovered a semi-automatic rifle, a pistol and cloned number plates, which have been seized for forensic examination.

Investigators allege the car is linked to a series of shootings and firebombings across southwest Sydney in recent weeks.

A semi-automatic rifle, a pistol and jerry cans were allegedly found inside the car.A semi-automatic rifle, a pistol and jerry cans were allegedly found inside the car. Credit: 7NEWS

This includes three incidents in Panania — one involving shots fired at a home and another where a firebombing targeted the wrong property — as well as two more incidents in St Johns Park and Colyton.

All three men have been charged with firearm and weapons offences, including possessing an unregistered prohibited firearm, possessing an unauthorised pistol in a public place, possessing ammunition without a licence, and participating in a criminal group.

The 28-year-old driver has also been charged with driving a stolen vehicle, police pursuit, reckless driving, and had two outstanding warrants executed for assault and domestic violence offences.

The two 24-year-olds were also charged with being carried in a stolen vehicle.

All three have been refused bail and are due to appear at Parramatta Bail Court on Sunday.