Porsche 911 bucket seats Weissach RS Carbon seats 997/991

the market for Porsche Full Carbon Bucket Seats (LWBs) is divided into two distinct “eras”: the legendary 997 folding buckets and the modern 991/918-style fixed-back buckets associated with the Weissach Package.

1. The 997 “Folding” Carbon Buckets

These are often called “GT2 Seats” because they debuted with the 997 GT2. They are unique because the backrest folds forward to allow access to the rear area, which is highly desirable for 911s that aren’t strictly track cars.

• Part Numbers: 997.521.065.00 (Left) / 997.521.066.00 (Right).

• Material: Carbon fiber shell with leather and Alcantara inserts.

• Weight: Approx. 18 kg per seat.

• 2026 Value: These have become “cult” items. A mint set in 2026 typically fetches $18,000 – $24,000 due to their rarity and the fact that they are the only folding carbon buckets Porsche ever made.

2. The 991 Weissach RS “918-Style” Buckets

These seats were introduced with the 918 Spyder and became the standard for the 991.1 and 991.2 GT3 RS and GT2 RS. When equipped with the Weissach Package, they feature specific aesthetic tweaks.

• Design: Non-folding, one-piece carbon fiber reinforced plastic (CFRP) shell.

• Weissach Specifics: * Headrest Branding: “Weissach RS” embroidery (instead of “GT3 RS”).

  • Weissach Logo: Often found on the seat belt pass-through or the seat insert pattern.

• Weight: Approx. 12.5 kg per seat (significantly lighter than the 997 versions).

• 2026 Value: A pair of genuine 991 Weissach RS buckets currently costs $15,000 – $20,000 on the secondary market.

3. Compatibility & Retrofitting

Can you put 991 seats in a 997 (or vice versa)?

• Physical Fit: Yes, the floor bolt patterns are identical across the 997, 991, and even the 981/718 Cayman platforms.

• The Airbag Problem: This is the main hurdle. The 991 seats use a different airbag connector and occupancy sensor system than the 997.

  • To put 991 seats in a 997, you usually need a custom wiring harness adapter and an “Airbag Delete” resistor or PIWIS coding to prevent the SRS warning light.

  • To put 997 seats in a 991, you will lose the advanced side-impact logic of the newer chassis.