Rivers added yet more silverware to the family trophy cabinet after taking out the Competition division at the NZDRA Summer Nationals in Taupo in December.
Rivers drove the family drag racing team's machine to a personal best time over the quarter mile stretch at Taupo Dragway.
Rivers stopped the clock at 6.70 seconds after reaching a top speed of 202mph or 320km/h to take the Competition title and a share of the lead coming into the finals this weekend.
Grant Rivers, owner of Rivers Speed and Spares, said team mechanics were always tinkering with the motors and he was confident the latest tweaks would have both cars pinging on all cylinders.
"Each driver will have to compete a minimum of four and and a maximum of eight runs over the weekend, so it's hard on the cars," Rivers said yesterday.
"Dean will probably have to do the most runs because of the size of the field in the Super Sedans. It's the most popular class and there will be more than 30 in the field this weekend. There are only six in our (Adrian's) class, but it's still very hard to win. Dean is only eight points ahead and that's a narrow margin with 120 points up for grabs. We are in a three-way tie, so it will come down to who is best on the day. We have worked on both cars and hopefully we can get that little bit extra out of them and come home with the trophies," he said.