Head Hunters Raid

A 1958 Ford Fairlane was seized. Photo: NZ Police

Guns have been seized as part of Operation Sylvester. Photo: NZ Police

Operation Sylvester has been running for some time, with police already seizing weapons ahead of today's raid. Photo: NZ Police

A 1964 Ford Thunderbird was among the vehicles seized by police. Photo: NZ Police

Operation Sylvester is an investigation into large-scale production and supply of methamphetamine. Photo: NZ Police

Police said they expected the seized items to be worth a total of $4 million. Photo: NZ Police

Ammunition has been seized during the investigation. Photo: NZ Police

Police Minister Michael Woodhouse said the operaion was part of a strategy to disrupt gangs. Photo: NZ Police