fitting question.

Just wondering what the difference is between the two is... I need one of them and i'm not sure which one it is.
DESCRIPTION RED/BLUE BLACK
-6 AN Male Flare for Civics w/out Fuel Pressure Damper 640910* 640913*
-6 AN Male Flare for Civics/Integras with Fuel Pressure Damper 640920 640923
I guess what is a Fuel Pressure Damper?
Ya i'm a noob.
DESCRIPTION RED/BLUE BLACK
-6 AN Male Flare for Civics w/out Fuel Pressure Damper 640910* 640913*
-6 AN Male Flare for Civics/Integras with Fuel Pressure Damper 640920 640923
I guess what is a Fuel Pressure Damper?
Ya i'm a noob.
