What is the difference between the elec-TRON R3 and the elec-TRON R1?

Both kits use Nitron's proportional solenoid valve and integrate directly with PASM, but the R3 adds independent manual high and low speed compression adjustment alongside the electronic damping control. That gives drivers and engineers control over both the active and mechanical sides of the setup simultaneously, a level of tunability the R1 doesn't offer.

What are the dry break quick disconnects on the front reservoirs for?

The dry break quick disconnects allow the front hose reservoirs to be removed quickly and cleanly without fluid loss, a practical detail on a car that sees regular service between track sessions. Dry break quick disconnects are also available as an optional add-on for the rear reservoirs.

Does the elec-TRON R3 support the factory front axle lift system?

This kit does not. Nitron offers a separate elec-TRON R3 with FAL Cylinders for buyers who need to retain the factory front axle lift system.

Is the elec-TRON R3 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.

Description

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BP PRICING DIFFERENCE

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Description

Nitron elec-TRON R3 Coilover Kit for 991 Porsche 911 GT2 RS, GT3, GT3 RS, and R

The Nitron elec-TRON R3 coilover kit for the 991 GT2 RS, GT3, GT3 RS, and R takes the elec-TRON platform a step further than the R1, combining Nitron’s proportional solenoid valve electronic damping control with independent manual compression adjustment so drivers and engineers have control over both the active and mechanical sides of the damping setup simultaneously. Each shock carries its own solenoid valve, with the elec-TRON system managed directly through the car’s existing PASM in real time; no additional controller required. Both front and rear units run hose-mounted reservoirs, with the front hoses featuring dry break quick disconnects for fast, clean removal without fluid loss; dry break quick disconnects are also available as an optional add-on for the rear reservoirs. Independent adjustment of high and low speed compression remains accessible at both ends alongside the electronic control, giving the elec-TRON R3 a level of tunability that neither a purely electronic nor a purely mechanical kit can match on its own. Adjustable top mounts and race springs are included, and every kit is custom built, custom sprung, and fully serviceable.

elec-TRON

Nitron’s elec-TRON system is built around a proprietary proportional solenoid valve fitted to each shock individually, giving PASM precise, independent damping control at every corner of the car simultaneously. Brake pressure, g-force, acceleration, steering inputs, and vehicle speed are all monitored at once, with damping adjustments made in real time. The suspension is responding 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 R3 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 damping hardware now doing the actual work alongside the manual compression adjustment the R3 adds on top.

Specialized Bi-Axis Hose Fittings

Nitron R3 Hose shocks use Nitron’s own 720 degree Bi-Axis fittings exclusively; a proprietary design that makes for clean, precise installation without the compromises that come with conventional end fittings.

Unique Technology

Nitron starts every shock with precision components that go through a thorough design and development process long before final assembly. The modular construction gives engineers the flexibility to approach each application on its own terms, without compromising part quality or how components perform together under real load. Everything is machined to tight tolerances and inspected individually by trained technicians; that standard of quality control runs through every stage of production, not just the end of it. New materials, finishes, and processes go through extensive validation before they’re adopted, with proprietary Nitron technologies built in throughout to produce shocks that consistently hold up against the competition on road and track. That’s the engineering foundation the brand has been built on since 1998.
- 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 adapt a generic damper to fit the 991 GT2 RS, GT3, GT3 RS, and R; they engineer one around it. Every application goes through a dedicated development process where components, spring rates, and damping characteristics are shaped by the specific platform, not carried over from something similar enough to work. The geometry, weight distribution, and suspension travel of these variants are part of the design from day one, not corrections introduced later. That’s the difference between suspension that works with a car and suspension that was purpose-built for it.

Features

Hose reservoir types
No manual damping adjustments are required, fully controlled by the solenoid valve
Preload adjuster
Full alloy body
Consists of 4 coilovers, reservoirs, hoses, and adjustable top mounts
Hand made to order

Specifications

Coilover Type: elec-TRON R3
Reservoir Type: Hose
Rear Suspension Type: OEM
Droplinks Included: No
Recommended Spring Rates:
- FRS – Fast Road Spec:
  - Front: 571lbs/inch (100N/mm)
  - Rear: 971lbs/inch (170N/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

What is the difference between the elec-TRON R3 and the elec-TRON R1? Both kits use Nitron’s proportional solenoid valve and integrate directly with PASM, but the R3 adds independent manual high and low speed compression adjustment alongside the electronic damping control. That gives drivers and engineers control over both the active and mechanical sides of the setup simultaneously, a level of tunability the R1 doesn’t offer.
What is the difference between the elec-TRON R3 and the NTR-R3? The NTR-R3 is a fully manual kit with independent 3-way adjustment but no electronic damping control. The elec-TRON R3 combines that same manual compression adjustment capability with Nitron’s proportional solenoid valve electronic control through PASM, so the two systems work together rather than one replacing the other. The elec-TRON R3 also requires the Nitron Electronic Damping Delete Kit, while the NTR-R3 does not.
What are the dry break quick disconnects on the front reservoirs for? The dry break quick disconnects allow the front hose reservoirs to be removed quickly and cleanly without fluid loss, a practical detail on a car that sees regular service between track sessions. Dry break quick disconnects are also available as an optional add-on for the rear reservoirs.
Does the elec-TRON R3 support the factory front axle lift system? This kit does not. Nitron offers a separate elec-TRON R3 with FAL Cylinders for buyers who need to retain the factory front axle lift system.
Is the elec-TRON R3 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.

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 R3 Coilover Kit for 991 Porsche 911 GT2 RS, GT3, GT3 RS, and R [NTCPO024ER3]

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Nitron elec-TRON R3 Coilover Kit for 991 Porsche 911 GT2 RS, GT3, GT3 RS, and R

elec-TRON

Integration with OEM Electronic Systems

Specialized Bi-Axis Hose Fittings

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