ask me anything about NOS and i can probably answer it or get you in touch with someone who can answer it

 

My buddy had the ZEX system on his GSR. He had the 55, 65, and 75 shot jets. He never ran the 75 shot, I don't know what the Civic motor would hold, but I'd do a compression test first, make sure your fuel has no blockages, then install the 55 shot.