Christain Hahn's car flips after colliding with Louis Leeds at the start of the home straight in 2017. It's hoped cheaper tickets will attract a decent crowd this year.

Manfeild is hoping a promotion to slash tickets to the coveted New Zealand Grand Prix for Palmerston North city and Manawatū district council ratepayers will boost attendance at the annual event.

This year prices have been slashed for ratepayers from the usual $80 for a weekend ticket to $20 if they buy a double pass using a promotional code online.

It follows an offer last year from promoters Speedworks to give free three-day passes to 45,000 Palmerston North and Manawatū District ratepayers at a potential value of $3.15 million. Only 5000 were redeemed.

The Toyota Racing Series finale will be contested at the Feilding racetrack on February 8-10, but the event has struggled to pull bumper crowds in the past, with an estimated 6000 punters turning out in 2018. In 2017, 2500 attended.

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The offer is part of a regional push to promote the race, the venue and the region, driven by Speedworks and councils in Manawatū District and Palmerston North.

Manfeild Park chief executive Julie Keane said this year's ticket prices were the lowest since the track won hosting rights in 2006.

"It is certainly also the cheapest price we know of for any current Toyota Racing Series round.

"Either way, it's an opportunity we hope fans will make the most of. Basically, they'd be crazy not to."

The promotion launched on the Speedworks website on Monday and closes at 5pm on February 8.

The Manawatū racetrack retained hosting rights to the prestigious race last year, despite an initial report from promoter Geoff Short claiming the race wasn't guaranteed back at Manfeild.

The deal involved a review after 2020, with a possible two-year extension.

"Obviously, we do not intend to give up the NZGP. There are strong regional, industry and historic reasons for it being here. We know local sentiment for retaining the race is strong. That is why the councils have directly involved," Keane said.

"However, the very best way to illustrate our love for the NZGP is to have a capacity crowd, and that has not been easily achieved in the past."

Two Kiwis, Marcus Armstrong and Liam Lawson, have emerged as hot talents throughout the series.

Clarification: The original version of this story failed to make it clear the cheaper tickets promotion is for Manawatū District and Palmerston North City Council ratepayers only, and is for a $20 double pass. The promoter of the event says the ticket discount offer is not because of attendance problems.