low 8's 

In drag racing terms less than eight and a half seconds to get down the quarter mile track.

That street legal chevy II is running low 8's, fastest street car I've seen before that was only in the mid 9's

low 8's by pyro_ August 17, 2009

low-8s 

Lower part of the 8000 rpm range, not typical on production cars. However, with a boatload of modiufications, a good car will be capable of low-8s. most sportbikes can easily reach low-11s.

201 mph, wow this ride is dope! Low-8s in sixth, holy death!!!

low-8s by DCMizzle January 11, 2008