The violations come under two sections in the rule book that says “will be long block sealed by NASCAR and must be completely inspected by NASCAR before the engine may be disassembled by the team.

Executives representing NASCAR’s three engine manufacturers took questions from the media Friday in advance of the big season ...

However, the Boss 429 block has a unique engine block casting with screw-in freeze plugs. With its mission rooted in winning NASCAR races, the Boss 429 was fitted with cylinder heads sporting free ...

The rule Denny Hamlin violated, which TRD took responsibility for, reads as follows: all race-winning engines “will be long ...

Trackhouse Racing Blocks Hendrick Motorsports from shaping Connor Zilisch’s future, ensuring control over his development ...