These are the lock nuts that hold the exhaust manifold to the down pipe. Four required. They are 10mm stud and require a 15mm Wrench to install them.
Exhaust Hanger for Eurovan 92-95
Exhaust Pipe Clamp for 92-95 Eurovan
Exhaust Hanger for Eurovan 92-96.
Rear Muffler for 92-96 Eurovan with 5-cylinder engine
Center Muffler for 92-96 Eurovan with 5-cylinder engine
Exhaust Hanger for 92-95 Eurovan