its the two rubber hoses coming from those two steel lines just in front of the airpump hose you were asking about....the ones with the large cracks all over them, they have 19mm/17mm fittings...one is the high pressure line feed to the fuel dist'...the other one is a return line...by the looks of those hoses, one touch or bump...and their history...i see one has already opened up!..look at photo #2!...their both about 5-7 inches long...so when the engine moves with torque they can flex

oh yeah those... i disconnected those at the top to see if i could get to the manifolds easier and they just like dissintigrated =/