How is the Nitron S3 Exige S RacePro 3 different from the NTR-R3 CupSport?

The Nitron S3 Exige S RacePro 3 is the full-race competition kit, built around a 46mm piston and valved purely for the track. The Nitron NTR-R3 CupSport keeps some road compliance in its valving for cars that are still driven to events. If your S3 Exige S arrives on a trailer and runs slicks, the RacePro 3 is the better fit.

What does the 46mm piston do on the Nitron S3 Exige S RacePro 3?

The 46mm piston in the Nitron S3 Exige S RacePro 3 moves a larger volume of oil for every millimeter of travel. That gives the damper more precise control as loads build under threshold braking, high-speed cornering and hard corner exits. Each adjuster click also produces a clearer change, which helps when you’re chasing small gains in setup.

Can the Nitron S3 Exige S RacePro 3 be used on the road?

The Nitron S3 Exige S RacePro 3 is designed for competition, and its valving doesn’t compromise for road comfort. It can technically be driven on the road, but owners who still cover road miles will be happier with the Nitron NTR-R3 CupSport, which balances its valving for uneven pavement while keeping full 3-way adjustment.

How are the reservoirs mounted on the Nitron S3 Exige S RacePro 3?

The Nitron S3 Exige S RacePro 3 uses hose-mounted reservoirs at both ends, each connected to its damper by a hose. Nitron’s Bi-Axis fittings let each hose leave the damper at the correct angle, which keeps routing tidy in the Exige’s crowded race-car packaging. Plan the reservoir locations so the compression adjusters stay easy to reach between sessions.

Are mounting brackets included with the Nitron S3 Exige S RacePro 3?

Yes. Mounting brackets come with every Nitron S3 Exige S RacePro 3 kit, so the coilovers fit the S3 Exige S double wishbone suspension without sourcing additional hardware. That keeps the install straightforward and means the kit arrives ready to fit.

How often should the Nitron S3 Exige S RacePro 3 be rebuilt?

Service intervals depend on how hard and how often the car runs. Many race teams rebuild their Nitron S3 Exige S RacePro 3 dampers between seasons, or sooner on a busy race calendar. Every unit is fully serviceable, and revalving can be done at the same time if your series, tires or aero package changes.

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Description

Nitron RacePro 3 Coilover Kit for S3 Lotus Exige S

When an S3 Exige S stops being driven to the circuit and arrives on a trailer instead, the suspension no longer has to work on the road. The Nitron S3 Exige S RacePro 3 coilover kit is designed for that car. It’s Nitron’s full-race competition setup, built around a 46mm piston and fully independent adjustment of rebound, low-speed compression and high-speed compression at every corner. The CupSport keeps some road compliance in its valving, and the RacePro 3 doesn’t. Every part of the kit is aimed at lap time on slicks, sustained aero load and the heavy weight transfer of threshold braking. That large piston gives the damper more control as loads build, so the car stays settled when you’re deep on the brakes at the end of a long straight. It also stays settled when you hammer the throttle out of a slow corner with the rear fully loaded. Hose-mounted reservoirs at both ends put the compression adjusters where an engineer can reach them between sessions. Mounting brackets are included, so the Nitron S3 Exige S RacePro 3 fits the double wishbone suspension without sourcing additional hardware.

Specialized Bi-Axis Hose Fittings

Inside an Exige race car, the space around each damper fills up quickly with bodywork, ducting, cooling lines and moving suspension. With reservoirs front and rear, four hoses need a clean path. Nitron’s exclusive Bi-Axis fittings pivot on two planes where each hose leaves the damper, so every hose on the Nitron S3 Exige S RacePro 3 can point directly toward its reservoir rather than being forced into a tight bend. The result is a neat, reliable installation at both ends, with hoses that stay clear of anything they could chafe against at full droop, full bump and full steering lock.

Unique Technology

The 46mm piston is the core of the Nitron RacePro 3. Each millimeter of shaft movement pushes a larger volume of oil through the valving than a smaller piston would. In practice, that means the damper builds force more precisely and has more control in hand when the chassis is heavily loaded. On a race car, that shows up as cleaner response to sharp weight transfer, and the adjusters make clear, repeatable changes instead of vague ones. The hose-mounted reservoirs add oil volume away from the damper body, so damping stays consistent through a full race distance as temperatures rise. With high- and low-speed compression adjusted independently at each reservoir and rebound at the damper, the Nitron S3 Exige S RacePro 3 gives a driver or engineer full control over how the car behaves at every phase of a corner.
- 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

Each Nitron S3 Exige S RacePro 3 kit is hand-built to order and set up for competition rather than road use. Springs and valving are specified around the car’s series, tires and aero package, and they don’t have to compromise for a drive home. That makes it the natural choice for a caged S3 Exige S racing in a club championship, a dedicated time-attack build or an endurance entry. Hard-anodized components and titanium hardware keep weight down on a car where every kilogram counts, and they resist corrosion through wet race weekends and the off-season. A race damper is only as good as its last rebuild, and every Nitron RacePro 3 unit is fully serviceable. Regular rebuilds keep it performing like new, and revalving lets the kit follow the car through regulation changes, new tire compounds and aero development.

Features

Hose reservoir type
16 clicks of high compression
26 clicks of low compression
24 clicks of rebound
Preload adjuster
3-way independent adjustment
Full alloy body
Consists of 4 coilovers, reservoirs, hoses, and mounting brackets
Hand made to order

Specifications

Coilover Type: RacePro 3
Adjustment Type: 3-way independent
Adjustment: 16 clicks of high compression / 26 clicks of low compression / 24 clicks of rebound
Reservoir Type: Hose
Mounting Brackets: Included
Recommended Spring Rates:
- Front: 850lbs/inch (149N/mm)
- Rear: 1300lbs/inch (228N/mm)

Applications

Lotus Exige S: S3 | 2012-2021

Other Suspension Kits for S3 Lotus Exige S

Notes

The RacePro 3 is designed for competition use
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 is the Nitron S3 Exige S RacePro 3 different from the NTR-R3 CupSport? The Nitron S3 Exige S RacePro 3 is the full-race competition kit, built around a 46mm piston and valved purely for the track. The Nitron NTR-R3 CupSport keeps some road compliance in its valving for cars that are still driven to events. If your S3 Exige S arrives on a trailer and runs slicks, the RacePro 3 is the better fit.
What does the 46mm piston do on the Nitron S3 Exige S RacePro 3? The 46mm piston in the Nitron S3 Exige S RacePro 3 moves a larger volume of oil for every millimeter of travel. That gives the damper more precise control as loads build under threshold braking, high-speed cornering and hard corner exits. Each adjuster click also produces a clearer change, which helps when you’re chasing small gains in setup.
Can the Nitron S3 Exige S RacePro 3 be used on the road? The Nitron S3 Exige S RacePro 3 is designed for competition, and its valving doesn’t compromise for road comfort. It can technically be driven on the road, but owners who still cover road miles will be happier with the Nitron NTR-R3 CupSport, which balances its valving for uneven pavement while keeping full 3-way adjustment.
How are the reservoirs mounted on the Nitron S3 Exige S RacePro 3? The Nitron S3 Exige S RacePro 3 uses hose-mounted reservoirs at both ends, each connected to its damper by a hose. Nitron’s Bi-Axis fittings let each hose leave the damper at the correct angle, which keeps routing tidy in the Exige’s crowded race-car packaging. Plan the reservoir locations so the compression adjusters stay easy to reach between sessions.
Are mounting brackets included with the Nitron S3 Exige S RacePro 3? Yes. Mounting brackets come with every Nitron S3 Exige S RacePro 3 kit, so the coilovers fit the S3 Exige S double wishbone suspension without sourcing additional hardware. That keeps the install straightforward and means the kit arrives ready to fit.
How often should the Nitron S3 Exige S RacePro 3 be rebuilt? Service intervals depend on how hard and how often the car runs. Many race teams rebuild their Nitron S3 Exige S RacePro 3 dampers between seasons, or sooner on a busy race calendar. Every unit is fully serviceable, and revalving can be done at the same time if your series, tires or aero package changes.

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 RacePro 3 Coilover Kit for S3 Lotus Exige S [NTCLO023_RP3]

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Nitron RacePro 3 Coilover Kit for S3 Lotus Exige S

Specialized Bi-Axis Hose Fittings

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for S3 Lotus Exige S

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews