There's a left strap and right strap.... kind of odd, but clearly shown in the above pic.
One strap is longer to go around the heat exchanger pipe up to the heat fan, the other goes around the mount on the engine.
If you deleted heat you will need shorter straps.
Pelican sells the left and right straps, maybe you bought two of the shorter straps without knowing this.
https://www.pelicanparts.com/search/?q=muffler+strap