Not only did the latest win seal a historic fifth national title for the Masons - it also means Sara Mason has equalled Bob Haldane's record of 24 successes as a co-driver in the NZRC.
She will get the chance to hold that record on her own when the fifth round of this year's championship is held in Coromandel on August 23.
If the Masons win there and again in the Daybreaker Rally of Manawatu on September 27 it will be the first clean sweep in the NZRC
Third place in the Wairarapa rally went to David Holder of Tauranga, who had a trouble-free run, with Graeme Featherstone of Te Aroha fourth and Matt Summerfield of Rangiora fifth.
Holding down second on the points table going into this event was Lance Williams but an off-road excursion ended his hopes while Dunedin's Emma Gilmour rolled out of the rally on special stage two in her Suzuki Swift and Brian Green retired with a broken gear selector.
Current NZRC points are: Richard Mason (Masterton-Subaru Impreza) 144, Ben Hunt (Nelson-Subaru Impreza) 58, David Holder (Tauranga-Mitsubishi Lancer) 54, Matt Summerfield (Rangiora-Subaru Impreza) 49, Lance Williams (Te Aroha-Subaru Impreza) 46, Graeme Featherstone (Te Aroha-Mitsubishi) 30, Phil Campbell (Tauranga-Mitsubishi) 20, Matt Jansen (Christchurch-Subaru Impreza) 18, Richard Baddock (Christchurch-Subaru) 18.