Mustang Front Rocker Panel Extension (1965-1968) Installation Instructions

Tools Required:
  • Spot Weld Cutter
  • Drill
  • Cup Brush
  • 4 lb. Sledge Hammer
  • Pliers
  • Small Chisel
  • Center Punch
  • 4 1/2 inch Grinder
  • Grinding Wheels
  • Cut-Off Wheels (thinnest you can find)
  • Welding Clamps
  • Welder
Install Difficulty:
  • Difficult
  • Difficult Project
1. To begin the installation of your new Mustang Front Rocker Panel Extension, support the car on all four corners with jack stands. Place them under the rockers.
2. Using a drill and cup brush, remove the paint to reveal the factory spot welds on the Mustang inner rocker panel.
Mustang Front Rocker Panel Extension Install Image
3. Using a center punch, try to center on each spot weld in the Mustang rocker panel and make a small indention.
4. Using a drill and Mustang spot weld cutter, center the cutter over each spot weld and drill through the inner rocker panel, being careful not to drill through the metal behind it.
Mustang Front Rocker Panel Extension Install Image
5. Using the cut-off wheel, cut the inner rocker panel from the remainder of the Mustang full rocker panel, far enough back towards the door so that you have room to fit the rocker extension.
6. Remove the inner rocker panel section.
Mustang Front Rocker Panel Extension Install Image
7. Locate the spot welds on the inside of the rocker extension and drill them out.
Mustang Front Rocker Panel Extension Install Image
8. Locate the spot welds on the outside of the rocker extension and drill them out.
Mustang Front Rocker Panel Extension Install Image
9. Using a chisel and hammer, work the metal loose and remove the rocker extension.
Mustang Front Rocker Panel Extension Install Image
10. After the removal of the old rocker extension, test fit the new piece to verify it's fit. Once the fit is acceptable, proceed to prep the new piece with Mustang paint.
11. Weld the new Mustang rocker panel in using the holes that were created in the removal of the old piece.
Mustang Front Rocker Panel Extension Install Image
Mustang Front Rocker Panel Extension Install Image
12. Replace the inner rocker panel and weld it in using the hole created during removal. The spot where you cut the piece from the inner panel will require stitch welding to complete the repair.
Mustang Front Rocker Panel Extension Install Image
13. This concludes the installation of your new Mustang Front Rocker Panel Extension.