Judgement Day is coming.

On October 7 diesel truck owners from several states will convene in Winchester at Thoroughbred Diesel for the company’s annual competition to find the most powerful truck in the region.

According to Thoroughbred employees Adam and Rebecca Craig, the event attracts dozens of diesel trucks and thousands of spectators each year.

Thoroughbred Diesel, located at 4843 Rockwell Road and owned by Dennis Craig, is an aftermarket diesel truck parts retailer that sells upgrades for competition and street trucks.

The trucks compete using a dynometer, a machine used to test the horsepower and torque of the trucks. contestants compete in three classes based on the extent of modifications the vehicles in the competition have had done, and the highest score in each class takes home a cash prize.

Adam Craig said this is the ninth year Thoroughbred has hosted the Judgement Day competition, which has made the Winchester based business an annual stop for some diesel truck enthusiasts. There will be about $30,000 worth of raffle prizes given away during the event, he said.

This year the company is also hosting a shine and show competition, where competitors can show off their vehicles to spectators with a chance to take home a $500 prize.

“It’s a family friendly event,” Rebecca Craig said. “We’ll have staff members cooking food, and proceeds from food sales will be donated to a local charity.”

The competition will begin at 8 a.m. and can continue throughout the entire day, Rebecca Craig said. She said there is so much diesel exhaust coming out of the building throughout the day that the fire department receives calls each year reporting the building is on fire.

Entry into the show is free for spectators.

There is still time for people who would like to compete to register for the event. The cost to register a truck is $100 and includes a dyno read of the vehicle. Registration for the shine and show is $25. Competitors can register online at thoroughbreddiesel.com.