League champions faced County Cup finalists in the West Norfolk Scaffolding Sunday League Division One Cup final at Fakenham Town.
It was champions Terrington who proved victorious, but they needed extra time to see off Chilvers.
Dean Twaite-Smith raced through to lob the stranded keeper to put Terrington ahead after three minutes and they hit Chilvers on the break when Neil Goodbourn scored his 33rd goal of the season with a cool finish.
The arrears were reduced when Ashley Keegan bundled home a corner and the second half saw Chilvers start to assert themselves.
They got their reward when Tom Doughty fired home from the edge of the box to make it 2-2.
Chilvers also hit the crossbar and then the post in extra time before Terrington scrambled home a winner through Daniel Chapman, after the keeper had saved a shot.
In the Division Two Cup final, Norfolk Junior Cup winners and four-times finalists Fairstead ANG were the overwhelming favourites but were blown away by Maltings.
James Ringwood opened the scoring for Maltings but Alex Vincent equalised.
Robert Powley regained the lead for Maltings and further goals were added by Dean Fish and a thunderbolt from Steve Parkes.
The match balls were sponsored by KitmanUK and the league thanked both them and hosts Fakenham Town for their support.
Sunday also saw one league match with England’s Hope beating White Bell 8-3 in Division One.
Despite the result, White Bell avoided relegation, while Hope stay in the race for second place.
Matt Willis, Simon Rose and an opponent were on target for Bell.
Ben Jimson scored a hat-trick for Hope with the other goals coming from Dean Jimson, Charlie Twyman, Luke Jackson, Joe Whyborn and Jake Fenn.