Top Definition
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 10, 2009
1 more definition
13 Words related to 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

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