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Vorshlag Seat Mounting Brackets for S550 Mustang

NOTE: These brackets are fabricated in-house and we make them in batches. There is no infinite warehouse with infinite stock of this part. If you need these quickly, PLEASE CALL and we can give you a more accurate ETA. Also, note these require other parts to mount the seat into the car (ie: side brackets). If you are confused, please email or call us. Thanks!


This product entry is for a bracket custom made by Vorshlag to install a 1-piece racing seat into the S550 Mustang. This "chassis bracket" bolts to the factory floorpan holes and provides a flat surface to mount seat side mount brackets. Optionally, you can add a dual-locking slider between the chassis bracket and side mount brackets. Because seats come in a variety of widths, and there are an even wider range of side brackets, you will have to calculate the position of the side bracket mounting holes and drill them. We do not cut slots into the mounting surface due to the reduction in strength and potential for deformation that slots create. The chassis bracket has an expansive, flat, mounting area to accommodate a wide range of seats. There is no accommodation for the stock seat belt on this bracket.

Key Features

  • Made for S550 Chassis
  • Constructed from welded steel plate, fabricated in-house by Vorshlag
  • Simplifies seat installation for racing seats
  • For use with most side mount brackets or sliders.
  • Includes four mounting anchors for use with the sub-belts and the lap belts of a 6-point racing harness
  • Left and Right side brackets available
  • Please allow 2-3 weeks after ordering for these to be built and painted.

Please call us before ordering if you have any other questions.

Below: Bracket used for this install along with side mounts, sliders, harness and seats. The low profile bracket allows plenty of headroom.


Why did we make these brackets for the S550 Mustang? It came down to having seen so many other seat brackets on the market first hand. Most were just too flimsy and flexible, some simply did not fit the chassis, others had a "shot gun" blast of random holes, most raised the seat up 1-3 inches higher than necessary. The Vorshlag mounting bracket is precision CNC cut to fit the mounting holes on the chassis, with welded mounts made against our production fixtures. This design has keyed slots cut to fit the welded reinforcing ribs underneath, which add rigidity and strength to the design. The stack-up height of these brackets is minimal - these are just tall enough to clear the floor, and no more.

Vorshlag seat mounting brackets are built 100% in-house here at Vorshlag. Once you receive our base brackets, you will have to source side brackets and mount those to your racing seat. Then line up the mounting holes on the bottom of the seat bracket, mark and drill those mounting holes into the base bracket. If you are using a slider you will similarly have to mark and drill those holes instead.


Choose your options

Choose the appropriate side from the drop down menus. Left and Right are from the driver's seated position.