J-Spec

literally stands for Japanese Spec

-Parts that are domestic to the country of Japan

-Also referred to as JDM

Person 1"that bumper looks cool what is it?"
Owner " That's a J-Spec bumper"

by Alex CRX Salinas February 11, 2009

j-spec

see JDM

can be used as an adjective to describe anything that is exotic to Japan and Japanese car culture

look at the angle on that exhaust - it's definitely j-spec

by sadfadf June 22, 2008