can some1 tell me what the "EG6" means in this "92-95 Civic EG6 SiR B16A Engine"??

"Civic" is the model "SiR" is the trim "B16A" is the engine and obviously "92-95" is the year but what does the "EG6" mean?

Thank You In Advance

 

IT's the chassis code

 

thanks man