The heavy-duty bars/tubes that connect the front and rear frame rails. The reason I ask is I am going through some issues on my car right now which was from not having them at one point or another. I have them now.
I thought you were saying I was missing them,...but nope ,never had any...some opf my buddies have added some, but its not std equipment...I am at least 4th owner...no history on this one...all I know its had 4 owners incl me in Texas ,and its a Wisconsin car...has no issues b/c of no frame conecctors...and I dont drive it wimpy either, but dont race it, I have put 18k on it since I bought it