How does the elec-TRON system work alongside the R3's manual compression adjusters?

The DCU manages overall damping through the solenoid valve at 200Hz, but the high and low speed compression adjusters on the hose reservoirs remain fully independent and accessible. The elec-TRON layer works alongside the mechanical adjustment, not instead of it. You can establish a mechanical baseline suited to a specific circuit and let the DCU handle the dynamic damping around it in real time.

Does the DCU come included with this kit?

No. The Nitron DCU is required for the elec-TRON R3 to operate and is sold separately. The coilover kit ships without it and the active damping system will not function until the DCU is connected.

How does the elec-TRON R3 differ from the elec-TRON R1 on these 996 variants?

Both use the solenoid valve and DCU for active damping control. The R3 adds independent 3-way manual compression adjustment through hose reservoirs, separating high speed compression, low speed compression, and rebound into three independent circuits. The R1 covers the same broad adjustment range without that separation. The R3 suits drivers who want to develop a setup with precision across different circuits; the R1 suits those who want active damping without the additional mechanical complexity.

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Description

Nitron elec-TRON R3 Coilover Kit for 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S

The Nitron elec-TRON R3 coilover kit for the 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S combines electronic damping control through Nitron’s proportional solenoid valve with independent manual compression adjustment, giving drivers and engineers control over both the active and mechanical sides of the damping setup simultaneously. Hose mounted reservoirs front and rear allow for straightforward independent adjustment of high and low speed compression, while the Nitron DCU handles overall damping in real time; note that the DCU is required and sold separately. Droplinks are included so the installation is complete without sourcing additional hardware. The kit is built for drivers who want to extract the most from these AWD and turbocharged 996 variants on road or track without leaving performance on the table. 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 on the 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S, giving the DCU precise, independent damping control at every corner of the car. G-load, vehicle speed, road conditions, and driver inputs are all monitored simultaneously, with damping adjustments made every 5 milliseconds. A human eye blink takes somewhere between 100 and 150 milliseconds; the elec-TRON system is working at a fraction of that. The suspension is responding to the road and the driver in real time, not reacting after the fact. These 996 variants do not use a factory electronic damping system, so this kit runs on Nitron’s Standalone Electronic Damping configuration.

Standalone Electronic Damping System

The Nitron DCU is required for the elec-TRON R3 kit on the 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S and is sold separately. It’s the brain behind the elec-TRON system, transforming a conventional passive damper setup into a precision semiactive platform. Working in conjunction with Nitron’s elec-TRON valve, the DCU continuously processes data from the car every 5 milliseconds; assessing vehicle attitude, braking forces, cornering loads, and acceleration inputs to determine the correct valve position and damping level at any given moment. The result is a suspension system that isn’t set to a fixed damping rate but is constantly optimizing grip and performance in real time based on what the car is actually doing. The DCU is fitted with an adjustable control knob giving the driver access to a range of pre-installed damping maps; Rain, Tour, Sport, and Race; each tuned for a specific driving context. Damping continues to be adjusted continuously within whichever map is selected, so the driver sets the overall character and the system handles the rest.
- Supplied with a custom or universal wiring harness
- Utilizes Arm Cortex-M4 processor
- Independent control of 4 electronic dampers
- 6 position rotary control switch or visual rotary display and control allows user to access a number of pre-installed damping maps (3 passive / 3 adaptive)
- Two 3 axis accelerometers
- 3 axis gyroscope
- 200Hz damping control rate
- Configured for application location and settings
- Ideal for resto-mod applications
- Fully resin bonded

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 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S; they engineer one around each variant. 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 each model 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 type
No manual damping adjustments are required, fully controlled by the solenoid valve
Preload adjuster
Full alloy body
Consists of 4 coilovers, reservoirs, hoses, droplinks, and adjustable top mounts
Hand made to order

Specifications

Coilover Type: elec-TRON R3
Reservoir Type: Hose
Rear Suspension Type: OEM
Droplinks Included: Yes

Applications

Porsche 911 Carrera 4: 996 | 1997-2005
Porsche 911 Carrera 4S: 996 | 2002-2005
Porsche 911 Turbo: 996 | 2001-2005
Porsche 911 Turbo S: 996 | 2005

Other Suspension Kits for 997 C4, C4S, Turbo, and Turbo S

Notes

Fits AWD models only
This kit requires the Nitron DCU to work
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 elec-TRON system work alongside the R3’s manual compression adjusters? The DCU manages overall damping through the solenoid valve at 200Hz, but the high and low speed compression adjusters on the hose reservoirs remain fully independent and accessible. The elec-TRON layer works alongside the mechanical adjustment, not instead of it. You can establish a mechanical baseline suited to a specific circuit and let the DCU handle the dynamic damping around it in real time.
Does the DCU come included with this kit? No. The Nitron DCU is required for the elec-TRON R3 to operate and is sold separately. The coilover kit ships without it and the active damping system will not function until the DCU is connected.
How does the elec-TRON R3 differ from the elec-TRON R1 on these 996 variants? Both use the solenoid valve and DCU for active damping control. The R3 adds independent 3-way manual compression adjustment through hose reservoirs, separating high speed compression, low speed compression, and rebound into three independent circuits. The R1 covers the same broad adjustment range without that separation. The R3 suits drivers who want to develop a setup with precision across different circuits; the R1 suits those who want active damping without the additional mechanical complexity.

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 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S [NTCPO027ER3]

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Nitron elec-TRON R3 Coilover Kit for 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S

elec-TRON

Standalone Electronic Damping System

Specialized Bi-Axis Hose Fittings

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for 997 C4, C4S, Turbo, and Turbo S

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews