Ford 2003 Mustang Workshop Manual page 2948

Installation
1. Position the LH dual converter.
Snug the LH converter-to-manifold nuts.
2. Position the RH dual converter pipe.
Snug the RH converter-to-manifold nuts.
3. If necessary, position the LH and RH dual converter pipes into the sleeve and install the clamps.
Tighten the clamps to 55 Nm (41 lb-ft).
4. Install the dual converter assembly nuts.