Sure looks like the tubes coming off the banjos up front could both be rotated 'down' enough to pull the lines down against the can.
This could be so easy for snagged brush to make happen, and those banjo fittings could also move w/o loosening the bolts or leaking, so not noticed right away by operator.
Notch the end of a foot long 1x3 and grab a 3lb or larger hammer. Starting with the inner pipe, knock them in and up to gain the clearance you desire. I'd think more in on the inner, and more up on the outer placing the notch behind the bends to not slip. Keeping blows away from the ends will let the distortion spread out. Avoid centering too coplanar with the bends to minimize risk of kinks or bumping it further to the rear than the end of the can.
In the Muffler shop and the GM car assembly chassis lines where I worked few might guess how many fits, from hood latches to doors to deck lids (trunks), were thanks to a BFRH or a millwright's pinch bar in the pre-robotic 'early '80s. Today I'd bet a cup of coffee I could finish and warranty this job in < 1/2 hr.