Sport & Track Seats

Adjustable lumbar support lightweight bucket seat. 
Sold each - One per seat

Fits:
Porsche 718 Boxster / Cayman - 2017 Onwards
Porsche 991  - 2019 to 2019
Porsche 992 - 2019 Onwards
Porsche 918 Spyder- 2014 to 2016

The incredible Lightweight Bucket Seats from Porsche adorn many vehicles from the 918 to the GT3, GT2, GT4, T and many other models if so equipped. 

We created this adjustable lumbar support for our vehicles out of necessity. Not only for the driver but the passenger who agreed to that 6 hour journey as our co-pilot. Typically these are quite comfortable seats but on longer journeys, a little lumbar support goes a long way to comfort the back of you and your co-pilot. 

These install in a minute for each side, adjustable for height (lower back, small of back, etc)

The air bladder is adjustable via a simple and lightweight ball pump and once the desired support is obtained, the ball pump can be removed and the hose and check valve tucked into the seat for an invisible install. Or just keep the ball for adjustment at anytime.

Dry carbon fiber bucket seat, with fabric center cushions in black and white Pepita pattern.
Upgrade your Porsche interior with the WEISSACH RS style dry carbon fiber bucket seat – engineered for lightweight performance, safety, and OEM-level fitment. Designed to deliver the perfect balance of race-inspired support and everyday comfort, these seats are ideal for both track enthusiasts and daily drivers.  

Fits:
Porsche 991 
Porsche 992

•  Constructed from high-quality dry carbon fiber
•  Fabric center cushions with Black and white Pepita pattern
•  Electric height adjustment and manual fore-aft movement
•  Integrated side airbags for enhanced safety
•  Custom colors and upholstery options available on request
•  OEM fitment with no modifications required

SilverRocket LWB Seat Angle Adjuster – Ergonomic Precision and Track-Ready Comfort for Porsche Models with LWB Seats
Sold per seat
The SilverRocket LWB Seat Angle Adjuster is a premium upgrade designed to improve comfort, ergonomics, and driver performance in Porsche 992.1 models equipped with lightweight bucket (LWB) seats. Developed with motorsport engineering precision, this adjuster subtly increases the seat’s rearward tilt to eliminate the overly upright posture common in standard setups — a position that can cause neck strain and fatigue, especially when wearing a helmet during extended drives or track sessions.

Fits:

• Porsche 992.1 Carrera 2 3.0L 2019-24
• Porsche 992.1 Carrera 4 3.0L 2019-24
• Porsche 992.1 Carrera 2S 3.0L 2019-24
• Porsche 992.1 Carrera 4S 3.0L 2019-24
• Porsche 992.1 Speedster 4.0L 2019-24
• Porsche 992.1 Turbo 3.8L 2020-24
• Porsche 992.1 Turbo S 3.8L 2020-24
• Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
• Porsche 992.1 GT3 RS 4.0L 2022-24
• Porsche 992.1 (911) Sport Classic 3.8L 2023
• Porsche 992.1 (911) Dakar 3.0L 2023-24

By refining the seat’s incline, the SilverRocket Adjuster enhances both driving comfort and control, allowing for a more natural seating position that optimises visibility, headroom, and steering alignment.

What Does the SilverRocket LWB Seat Angle Adjuster Do?

The adjuster redefines how you sit behind the wheel. It fine-tunes the angle of the LWB bucket seat, transforming it from a static racing position into a performance-ergonomic configuration that’s equally suited to spirited driving and long-distance touring.

Core Functions:

• Enhances backward tilt for a more relaxed, natural seating posture.
  
• Increases helmet clearance, improving comfort during track driving.
  
• Reduces neck and back strain by correcting overly upright seat geometry.
  
• Improves overall ergonomics and body alignment for better driver endurance.

When paired with the SilverRocket 3D Bucket Seat Insert, the seat achieves a comfort level comparable to Porsche’s premium comfort seats — without sacrificing track-day performance.

Why Do Standard Seat Mounts Cause Issues?

While Porsche’s LWB seats deliver exceptional lateral support, their fixed angle can create ergonomic challenges during long drives or helmeted track use. Common issues include:

• Excessively upright posture, causing discomfort over time.
  
• Limited helmet clearance, forcing the head forward under load.
  
• Increased fatigue, reducing driver focus and control.
  
• Inflexible seat geometry, offering no adjustability for different driver builds.

The SilverRocket LWB Seat Angle Adjuster solves these problems through precision-machined titanium engineering that allows for a more adaptive, performance-oriented seating position.

Why Upgrade to SilverRocket’s TC-4 Titanium Seat Adjuster?

Unlike conventional aluminum spacers or steel brackets, the SilverRocket Seat Adjuster is crafted from aerospace-grade TC-4 titanium — 10x stronger than aluminum — to ensure unmatched structural integrity and safety under track conditions.

Key Benefits:
Enhanced seating posture for both high-performance and comfort driving.
Track-ready strength, exceeding manufacturer specifications for load and stress resistance.
Proprietary Anti-Scratch Stopper, eliminating the risk of seat rail damage.
Minimally invasive design, preserving the original seat slider mechanism and full adjustability.
Sleek electroplated black nickel finish, complementing Porsche’s interior styling.
Weight-efficient construction, maintaining optimal balance and safety compliance.

This combination of comfort, safety, and craftsmanship makes the SilverRocket Seat Adjuster the most advanced ergonomic upgrade available for Porsche 992.1 models with LWB seats

Highlights:

• Improved rear seat tilt for a natural, ergonomic posture.
  
• Enhanced comfort comparable to Porsche’s comfort seats when paired with SR 3D inserts.
  
• Aerospace-grade TC-4 titanium construction, 10x stronger than aluminum.
  
• Proprietary Anti-Scratch Stopper, preventing seat rail damage.
  
• Maintains full slider functionality, with a minimally invasive installation.
  
• Electroplated black nickel finish for a premium aesthetic.
  
• Optimised for helmet use, reducing strain during track sessions.       

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9GT881105BY

The product you are viewing cross references to these numbers

Sub strap mount Light Weight Bucket Seat (LWB). 
Sold each - Fits left or right hand seat



Fits:
Porsche 981 Cayman GT4
Porsche 718 Cayman GT4 / GT4 RS
Porsche 991.1 / 991.2 GT3 / GT3 RS
Porsche 992 GT3 / GT3 RS / GT2 RS

The Best Way to Install Sub Straps in your Porsche
The Performance Sub Strap Mount is a must-have for Porsche GT2RS, GT3/GT3RS, and GT4 owners using five, six, or seven-point harnesses with the factory CFRP Full Bucket Seats (also called Light Weight Bucket seats). Designed to easily bolt in using existing seat hardware without having to fully remove the seats from the car, the Performance Sub Strap Mount properly anchors your harness anti-submarine straps ("sub straps") to your seat base.

The CMS Performance Sub Strap Mount fits the driver- and/or passenger-side seats.
Performance install harness sub straps in your Porsche are Made in the USA.

Performance Sub Strap Mounts are designed, manufactured, and powder-coated entirely in-house in the USA. Made of solid carbon steel while only weighing 1.4 lbs (625g), there's not a stronger, more affordable solution available. Sub Strap Mounts allow full seat adjustment, fore/aft and up/down, while maintaining the ideal sub strap angle to your body for maximum safety.

Performance Sub Strap Mount Details:

• Solid steel construction for maximum safety
• Allows full fore/aft and up/down seat adjustment
• Powder-coated satin black standard; several Porsche colors available in the drop-down above!
• Fits driver or passenger seat (Porsche LWB only)
• Simple to install
• Compatible with OEM seat belt and airbag hardware