According to Crutchfield many receivers will
not fit a Titan because of a depth problem.
Does anyone know what is the first thing
that a receiver would hit when sliding it back?
One of those listed with a clearance problem
is the Sony CDX-7715X, but I found a photo
of one installed in a Titan ??

you shouldnt have a clearance problem, the stock player is a full sized double din player....you shouldnt hit anything