What a rear seat delete means and why owners do it

A rear seat delete on a GR86 means physically removing the rear bench seat, seat belt anchors, and sometimes the rear seat frame entirely. The result is an empty cargo area behind the front seats. Owners do this for weight reduction (the rear seat assembly weighs roughly 40 to 50 pounds), to create flat cargo space for track equipment or larger items, or straightforward because they never use the rear seats and want the car to feel more stripped-down.

The GR86 is a lightweight sports car where every pound matters on a track. Removing the rear seats lowers the center of gravity slightly and improves the power-to-weight ratio. For street use, the main benefit is cargo flexibility — you can lay down a sheet of plywood or fit a full-size toolbox where passengers would normally sit.

This is a permanent modification. Once you remove the seats and anchors, reinstalling them later requires buying replacement hardware and potentially having the floor repaired if you've cut or drilled. Some owners keep their original seats in storage in case they sell the car, since rear seats are a standard feature buyers expect.

Key Takeaways

  • Removing the rear seats and anchors takes two to four hours with basic hand tools and requires no special equipment or welding.
  • You will need to disconnect the seat belt system, unbolt the seat frame from the floor, and remove the trim panels that cover the mounting points.
  • The GR86 rear seat assembly weighs 40 to 50 pounds total, and removing it also means losing the rear seat belt system unless you relocate the anchors.
  • Some owners weld or bolt a flat floor panel in place after deletion; others leave the bare floor and add removable plywood or a cargo tray.
  • Check your local vehicle code before deletion if the car is street-driven, since some jurisdictions require functional seat belts for all seating positions.

Tools and materials you will need

Start with a basic socket set (10mm, 12mm, and 14mm sockets cover most GR86 fasteners), a ratchet, a screwdriver set, and a trim removal tool or plastic pry bar to pop off interior panels without cracking them. You will also need jack stands or a lift if you want to access the underside of the seat frame, though most of the work happens from inside the cabin.

For the seat belts, you may need a panel removal tool to disconnect the inertia reel mechanism from the C-pillar. A flashlight or headlamp helps you see into the gaps where bolts hide. If you plan to weld a floor panel in place, you will need welding equipment and steel sheet stock, or you can have a shop do this step. Many owners skip welding and straightforward bolt down a removable plywood platform instead.

Wear work gloves and safety glasses. The seat frame edges can be sharp, and you may encounter old fasteners that are tight or corroded. Have a container ready to organize bolts and fasteners so you do not lose them if you decide to reinstall the seats later.

Step-by-step removal process

Step 1: Disconnect the seat belt system. Open the rear doors and locate the seat belt inertia reel mounted to the C-pillar (the vertical trim piece between the rear and front doors). Remove the trim panel covering it by prying gently with a plastic tool. Unbolt the inertia reel from the pillar — usually two bolts. Disconnect the lower seat belt anchor bolt from the floor on both sides of the rear seat. You now have the entire seat belt system loose.

Step 2: Remove the rear seat cushion. Lift the rear seat cushion up and forward. On the GR86, the cushion is held by two bolts at the base where it meets the floor. Remove these bolts and slide the cushion out. Set it aside in a safe place if you plan to keep it.

Step 3: Remove the seat back. The seat back is bolted to the floor at the base and to the C-pillars at the top. Remove the bolts at the floor first (usually two bolts, one on each side). Then unbolt the top connections where the seat back meets the pillars. Slide the seat back out carefully — it is tall and can catch on the door frame if you angle it wrong.

Step 4: Remove the seat frame and floor brackets. Once the cushion and back are out, you can see the metal frame underneath. This frame is bolted to the floor at multiple points. Remove all floor bolts. Some frames also have welds or spot welds connecting them to the floor — if yours does, you will need to drill these out or cut them with a rotary tool. The frame should then lift out completely.

Step 5: Clean up the floor and trim. With the frame gone, you will see the bare floor, mounting holes, and possibly some wiring or clips for the seat belt system. Remove any remaining bolts, clips, or brackets. Vacuum out debris. If you drilled out spot welds, grind down any sharp edges. At this point, you have a choice: leave the floor bare, bolt down a removable plywood platform, or have a shop weld a permanent steel floor panel.

Dealing with the floor after seat removal

The bare floor under the rear seats has mounting holes and is not finished. Most owners choose one of three approaches. The first is to do nothing — straightforward leave it bare and use the space for cargo. This is the cheapest option and keeps the car reversible, but the floor looks unfinished and can collect dirt and water.

The second approach is to bolt down a removable plywood platform or a commercial cargo tray. You can buy pre-made trays designed for the GR86, or you can cut a piece of 3/4-inch plywood to fit the space and bolt it down using the existing mounting holes. This gives you a clean look and a flat surface, and you can remove it if you need to reinstall the seats later.

The third approach is to have a shop weld a permanent steel floor panel in place. This looks factory and is the most durable option, but it makes the deletion permanent and requires welding skills or a trip to a fabrication shop. Some owners also add sound deadening material under the panel to reduce road noise.

Seat belt and safety considerations

Removing the rear seats also removes the rear seat belt system. If your GR86 is street-driven, check your state or local vehicle code — some jurisdictions require functional seat belts for every seating position, even if you never use them. A few states allow rear seat deletion if the car is used only for track or off-road driving, but others do not.

If you need to keep the seat belt system functional for legal reasons, you have two options. The first is to relocate the seat belt anchors to a roll cage or custom frame if you install one. The second is to leave the inertia reel and anchors in place but remove only the seat cushion and back, leaving the frame. This is less common but keeps the belts legal.

For track-only cars, the rear seat delete is usually not a legal concern. Many track cars run without rear seats. If you ever plan to sell the car to someone who wants the rear seats back, keeping your original seat assembly in storage makes the car easier to restore to stock condition.

Common mistakes and how to avoid them

The most common mistake is not labeling or organizing fasteners. The GR86 has bolts of different lengths and gauges holding different parts. Take a photo of each step before you unbolt anything, and use a small container or tape to label each group of bolts. This saves hours of guessing when you reassemble or if you need to reinstall the seats.

Another mistake is damaging the trim panels or C-pillars while prying. Use a plastic trim tool, not a metal screwdriver, and pry gently. The panels are glued and clipped, and they will pop off with steady pressure — do not force them. If a clip breaks, you will need to buy a replacement panel.

A third mistake is not checking for wiring before cutting or drilling. Some GR86 models have wiring routed under the rear seat area for the seat belt pretensioner or other systems. Look carefully before you drill, and trace any wires you find. If you are unsure, take a photo and ask in a GR86 forum before proceeding.

Finally, do not assume all mounting holes need to be filled. Some holes are for the seat frame only and do not affect the structural integrity of the floor. However, if you drilled out spot welds, those areas should be reinforced or sealed to prevent rust. A small amount of welding or epoxy filler is worth the effort.

Frequently Asked Questions

Will removing the rear seats affect the car's handling or safety?

Removing 40 to 50 pounds from the rear lowers the center of gravity slightly and improves the power-to-weight ratio, which most owners feel as a small improvement in acceleration and handling. It does not affect structural safety as long as you do not cut the floor or remove load-bearing welds. The car is still safe to drive on the street or track.

Can I reinstall the rear seats after a deletion?

Yes, if you keep the original seat assembly and do not cut or weld the floor. You will need to reinstall the mounting bolts and seat belt anchors. If you drilled out spot welds, you may need to have a shop re-weld them or use threaded inserts to create new mounting points. Keeping your original seats in storage makes this much easier.

Do I need to modify the floor if I remove the seats?

No, but most owners do. A bare floor with mounting holes looks unfinished and collects dirt. A removable plywood platform or commercial cargo tray is the easiest fix and keeps the car reversible. A welded steel floor panel looks factory but is permanent.

Will a rear seat delete pass vehicle inspection?

This depends on your state or local code. Some jurisdictions require functional seat belts for every seating position, which means you cannot delete the rear seats on a street-driven car. Others allow it if the car is used only for track or racing. Check your local regulations before you start, or ask your inspection station.

How much weight does the rear seat assembly actually weigh?

The rear seat cushion, back, frame, and belt system together weigh roughly 40 to 50 pounds. The exact weight varies depending on whether your GR86 has heated seats or other options. For a 2,800-pound car, this is about a 1.5 percent reduction in weight, which is noticeable on a track but subtle on the street.