Coming Soon: Upgrading My 991.2 GT3 RS with a Manthey Roll Bar, Race Seat, and Harness!

In this upcoming article and video tutorial, I'll be installing a Manthey Roll Bar, a racing seat (either Recaro or Sabelt), and Schroth Racing harnesses in my 991.2 GT3 RS. This guide will walk you through the process, offering valuable tips for anyone looking to prep their car for the track!

 

How do you plan on turning off the airbag light? This is what has been holding me back from installing a racing seat.

 

How do you plan on turning off the airbag light? This is what has been holding me back from installing a racing seat.

Great question! I'll assume the dealership will clear the code. I'll confirm how they manage the airbag light and will follow-up in a few weeks.

 

Great question! I'll assume the dealership will clear the code. I'll confirm how they manage the airbag light and will follow-up in a few weeks.

From my research over the years, it seems that only Manthey themselves has the ability to code out the airbag light for 991s. A couple local shops have claimed this ability, however I have not seen any success stories.

 

Interesting. My roll bar and seat are being installed by Porsche so I'll assume they have the ability to code out the airbag light.

I plan to be at Porsche tomorrow and I'll ask the technician if he can provide addition info.

 

@DiscoWagon - talking to the service manager, sounds like they can code out the airbag light. I'll confirm with the technician once I do my final seat fitment.

 

Update – 15 Apr 2025:

• The Sabelt GT Pad seat won't fit in my 991.2 GT3 RS unless:
  • The door card and center console are removed.
• Ordered low-profile sliders to allow others to move the seat forward, but:
  • The sliders were too narrow for the OEM seat bolt locations.
  • Ended up needing to purchase the GMG adapter plate.
• Decided not to use the Sabelt GT Pad seat.
• Next steps:
  • Trying out the Sabelt Taurus and Recaro Profi SPG XL to see which fits me better.
    • Both should fit without removing the door card or center console.
  • Planning to create a custom harness to eliminate the airbag light if it can’t be coded out.
• Additional mods:
  • Modified the rear door cards to fit the Manthey roll bar.
  • Used a template for trimming – came out clean.
• Fitment notes:
  • Lost about 1 inch of rearward seat travel, so I'm sitting closer to the wheel than preferred.
  • As a bigger person, there's always a compromise with fitment.

 

Why did the rear door cards need to be trimmed for the roll bar? This is surprising as I always thought the MR bar was modeled after the OEM one.

 

Why did the rear door cards need to be trimmed for the roll bar? This is surprising as I always thought the MR bar was modeled after the OEM one.

That's what I thought as well. I actually asked the dealership to leave the rear door cards out, but it seems that message didn’t make it to the technician. Once I get the car back, I’ll post some pictures and share more detailed info on why the Manthey roll bar—supposedly based on the OEM Clubsport design—requires modifications to the door cards.

 

Update – 22 Apr 2025:

• Stopped at Discovery Parts located at Atlanta Motorsports Park (north of Atlanta, Georgia).
• Tried out a variety of seats in person.
• Chose the Sabelt Titan XL:
  • Felt the most comfortable and supportive for my build.
  • The Recaro Profi SPG XL was still too narrow in the back and shoulders.
  • Decided not to go with the Sabelt Taurus:
    • Don’t think I need the head restraints at this point.
    • Might revisit if I get into actual wheel-to-wheel racing.
• Porsche is handling the return of the Sabelt GT Pad and ordering the Titan XL.
  • Hoping Sabelt doesn’t give us any issues with the return—no restocking fees or surprise charges.
• I’m expecting to get the car back this week and will provide more insight into why the rear door cards needed to be modified for the Manthey roll bar.