yes, they fit the same in the opening but the 57 one is designed for mounting the 57 grill so you'd need to modify mounting holes for the 56 grill

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics