Sharp entered the title-deciding weekend just one point ahead of Hitech racer Macintyre, but a lights-to-flag win from pole in the opener, with Macintyre third, put the New Zealander in a good position to take the spoils.
Both drivers safely navigated starting at the back of the reversed-grid middle race but Macintyre only slightly reduced Sharp's lead by finishing seventh to his rival's 11th.
Although Sharp was beaten off the line in the third and final contest by Deagen Fairclough, he maintained the runner-up spot throughout the race and remained around a second ahead of Macintyre to claim the glory by an eventual margin of 13 points.
“It means everything – all the hard work and sacrifice has definitely paid off,” a delighted Sharp told Autosport.
“It’s been a year of ups and downs and some of the highs have been very high and the lows very low, but massive thanks to the team - I still can’t believe it’s happened!”
Sharp says he's “not 100% sure” which series he will progress to next year and will now assess different options.
“I’ve got a great relationship with Rodin Carlin - we’ll see what happens,” he added.
Source: Autosport