How does the electronic damping control work on the elec-TRON R1?

Each shock carries its own proportional solenoid valve, giving PASM precise, independent damping control at every corner simultaneously. The system processes brake pressure, g-force, acceleration, steering inputs, and vehicle speed in real time, adjusting damping as conditions change rather than responding after the fact.

What is the difference between the elec-TRON R1 and the NTR-R1 for these 911 variants?

The NTR-R1 is a non-electronic kit with manual combined 2-way damping adjustment. The elec-TRON R1 retains electronic damping control through PASM, with no manual adjustment required. Both share race-derived hardware, but the elec-TRON R1 is the correct choice for drivers who want to retain full PASM functionality with significantly more capable hardware behind it.

Is the elec-TRON R1 serviceable?

Yes. Every unit is hand-built to order and fully serviceable, meaning the kit can be rebuilt and re-valved rather than replaced when it eventually needs attention.

Does the elec-TRON R1 support the factory front axle lift system?

This one does not, however Nitron offers a separate elec-TRON R1 kit with FAL Cylinders for buyers who need to retain the factory front axle lift system.

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Description

Nitron elec-TRON R1 Coilover Kit for 991 Porsche 911 GT2 RS, GT3, GT3 RS, and R

The 991 Porsche 911 GT2 RS, GT3, GT3 RS, and R are platforms that respond well to a properly developed suspension setup, and the Nitron elec-TRON R1 coilover kit brings electronic damping control through Nitron’s proportional solenoid valve, managed directly by the car’s existing Porsche Active Suspension Management (PASM) system. No additional controller is required; the kit integrates with PASM as it sits, so nothing is lost from the factory interface. The kit includes adjustable top mounts and race springs, covering the same broad adjustment range as the R3 without the independent compression adjustment and remote reservoirs. The hardware traces directly back to the R3 platform, so what you’re getting is proven race-derived componentry packaged into a more accessible, straightforward setup; one that works particularly well on these variants, where the chassis dynamics and engineering foundation already provide a strong base and the suspension just needs to keep up with precision rather than complexity.

elec-TRON

The elec-TRON R1 for the 991 GT2 RS, GT3, GT3 RS, and R uses Nitron’s proportional solenoid valve fitted to each shock individually, with all damping managed directly through the car’s existing PASM system. Each shock carries its own valve, giving PASM precise, independent damping control at every corner simultaneously. The system processes brake pressure, g-force, acceleration, steering inputs, and vehicle speed all at once, making damping adjustments in real time. The suspension is reacting to what the road and the driver are doing as it happens, not catching up after the fact.

Integration with OEM Electronic Systems

The Nitron elec-TRON R1 goes in as a direct bolt-in replacement on these variants, picking up the existing PASM integration without any modification needed. Factory functionality stays intact; PASM continues to operate exactly as designed, with significantly more capable hardware now doing the actual work.

Unique Technology

Nitron builds every shock around precision components that go through a thorough design and development process long before final assembly. The modular construction gives engineers the room to develop each application properly on its own terms, without cutting corners on part quality or how components work together under load. Everything is machined to tight tolerances and inspected individually by trained technicians; quality control isn’t a final step here, it runs through the entire process. New materials, finishes, and processes are validated extensively before they’re brought into production, with proprietary Nitron technologies woven throughout to produce shocks that hold up against the competition on both road and track. That level of engineering discipline is what the brand has been built on.
- Basic Damper Design:
  1. End Eye / Top Mount
  2. Damper Piston & Shim Stack
  3. Shaft / Rod
  4. Floating / Separator Piston
  5. Suspension Oil
  6. Compressed Nitrogen Gas

Bespoke Engineering

Nitron doesn’t start with a generic damper and work backward from there. Every application is developed from the ground up, with components, spring rates, and damping characteristics determined by the specific platform rather than borrowed from something adjacent. The geometry, weight distribution, and suspension travel of the 991 GT2 RS, GT3, GT3 RS, and R shape the design from the start, not as corrections added later. That’s what separates a kit engineered for these cars from one that was simply made to fit them.

Features

Shares core technology with the R3 kit
No manual damping adjustments, fully controlled by the solenoid valve
Internal reservoir type
Full alloy body
Preload adjuster
Nitrogen gas charged
Integrates with Porsche PASM
Precision bearing spacers supplied as required
Consists of 4 coilovers and adjustable top mounts
Hand made to order

Specifications

Coilover Type: elec-TRON R1
Rear Suspension Type: OEM
Droplinks Included: No
Recommended Spring Rates:
- FRS – Fast Road Spec:
  - Front: 571lbs/inch (100N/mm)
  - Rear: 913lbs/inch (160N/mm)
- TDS – Track Day Spec:
  - Front: 685lbs/inch (120N/mm)
  - Rear: Data not available

Applications

Porsche 911 GT2 RS: 991.2 | 2017-2019
Porsche 911 GT3: 991.1, 991.2 | 2013-2019
Porsche 911 GT3 RS: 991.1, 991.2 | 2015-2016, 2018-2019
Porsche 911 R: 991.1 | 2016

Other Suspension Kits for the 991 GT2 RS, GT3, GT3 RS, and R

Notes

Compatible with Porsche’s PASM system, no additional products are needed
Custom spring rates also available, please contact us directly here for more information or for a consultation on custom rates
Images used for illustration purposes only. Specific details, finishes and end fittings may differ from that shown.

Frequently Asked Questions

How does the electronic damping control work on the elec-TRON R1? Each shock carries its own proportional solenoid valve, giving PASM precise, independent damping control at every corner simultaneously. The system processes brake pressure, g-force, acceleration, steering inputs, and vehicle speed in real time, adjusting damping as conditions change rather than responding after the fact.
What is the difference between the elec-TRON R1 and the NTR-R1 for these 911 variants? The NTR-R1 is a non-electronic kit with manual combined 2-way damping adjustment. The elec-TRON R1 retains electronic damping control through PASM, with no manual adjustment required. Both share race-derived hardware, but the elec-TRON R1 is the correct choice for drivers who want to retain full PASM functionality with significantly more capable hardware behind it.
Is the elec-TRON R1 serviceable? Yes. Every unit is hand-built to order and fully serviceable, meaning the kit can be rebuilt and re-valved rather than replaced when it eventually needs attention.
Does the elec-TRON R1 support the factory front axle lift system? This one does not, however Nitron offers a separate elec-TRON R1 kit with FAL Cylinders for buyers who need to retain the factory front axle lift system.

About Nitron Suspension

Nitron Suspension has been at the forefront of precision suspension engineering since 1998, founded by Guy Evans with the goal of building high-performance shocks for enthusiasts and professionals alike. Over 200 dealers now carry Nitron products across Europe, Asia, the US, Australasia, and Africa. In 2008, the company moved into a dedicated facility in the UK’s Motorsport Valley, adding dynamometers, 5-axis CNC machines, and 3D CAD capabilities to support both growing demand and continued product development. A second expansion came in 2023 with a new office in Murrieta, California. The team behind every Nitron product draws from deep backgrounds in machining, materials technology, hydraulics, bike engineering, and F1 racing, with many engineers bringing firsthand experience as competitive drivers and riders. That depth of knowledge across both the technical and competitive sides of motorsport shapes every product Nitron develops.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Nitron elec-TRON R1 Coilover Kit for 991 Porsche 911 GT2 RS, GT3, GT3 RS, and R [NTCPO024ER1]

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Nitron elec-TRON R1 Coilover Kit for 991 Porsche 911 GT2 RS, GT3, GT3 RS, and R

elec-TRON

Integration with OEM Electronic Systems

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for the 991 GT2 RS, GT3, GT3 RS, and R

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews