General Motors New Zealand ran its own assembly line in Petone (1966-67) and Trentham, near Wellington, to 1971. Up until 1966 the Cresta was fully imported from Britain. From 1966 the Petone plant began locally assembly of the Cresta. The one 'base' Cresta model built changed very little during that time and did not receive the facelift that appeared on the UK market late in 1970 as the 1971 model. The only option was the 2 speed Powerglide. However, at some point in production (1970) the brake system was upgraded to a tandem master cylinder to improve the braking, and this upgrade became a standard fitment on the New Zealand models. A few twin-headlamp Cresta Deluxe, Viscount and estate car versions were also imported, built-up, from the UK.