The 426 HEMI engine was the first ever to run what in NHRA?

The 426 HEMI engine is renowned for its significant impact on drag racing, particularly within the NHRA (National Hot Rod Association). It made history by being the first engine to achieve a 10-second quarter mile run in competitive drag racing. This achievement marked a pivotal moment in the sport as it demonstrated the extraordinary power and performance capabilities of the 426 HEMI, setting a new standard for drag racing performance.

The 10-second benchmark was particularly revolutionary during the era, as achieving such times was a considerable feat that showcased advancements in both automobile technology and engineering. The performance of the 426 HEMI not only established it as a powerhouse in the racing community but also solidified its legacy as one of the most iconic engines in automotive history.

In terms of the other options, while the 8-second, 9-second, and 11-second quarter miles also represent significant accomplishments in drag racing, they do not align with the historic milestone first set by the 426 HEMI engine.