With temperatures at Kentucky Speedway nearing triple digits, it was Joey Couler who scorched the field during the final Happy Hour practice for this evening’s UNOH 225 NASCAR Camping World Truck Series 225.

SPEED’s live Truck Series television coverage from Kentucky Speedway begins with qualifying at 5 p.m. ET. NASCAR Camping World Truck Series Setup airs at 7:30 p.m., followed by the race at 8 p.m.

Coulter, who was also fastest in opening stanza, blistered the Kentucky oval with a lap of 171.336 miles per hour in his No. 22 Richard Childress Racing Chevrolet Silverado, best of anyone during the final 90-minute session.

Second fast was Brazilian Miguel Paludo, who ran 171.070 mph in his Turner Motorsports Chevy. Paludo’s teammate and countryman Nelson Piquet Jr. was next at 170.919 mph.