What does 3-way adjustment do for a rear-drive C4 on track?

The Nitron Corvette NTR-R3 lets you control how the car squats under power separately from how it handles bumps. Low-speed compression and rebound manage weight transfer on corner entry and exit. High-speed compression manages curbs and sharp hits. You can help the rear put power down out of slow corners without making it skittish over a rough exit.

How are the reservoirs mounted on the Nitron Corvette NTR-R3?

The Nitron Corvette NTR-R3 uses hose-mounted reservoirs at all four corners, each connected to its damper by a hose. Nitron’s Bi-Axis fittings let each hose leave the damper at the right angle, which keeps routing clean at both ends of the car. Plan the reservoir locations before installation so the compression adjusters stay easy to reach.

Does the Nitron Corvette NTR-R3 remove the factory leaf springs?

Yes. The Nitron Corvette NTR-R3 is a true coilover kit, so both transverse leaf springs are removed and each corner gets its own coil spring on the damper. The coilovers mount in the factory locations and the OEM rear suspension layout stays in place, so you gain ride height and corner-weight adjustment without fabricating new mounts.

Should a C4 owner choose the Nitron NTR-R3 or the Nitron NTR-R1?

If the C4 is mainly a track, time-attack or race car, choose the Nitron NTR-R3. It adds independent rebound, low-speed compression and high-speed compression, plus remote reservoirs that keep damping consistent over long sessions. The Nitron NTR-R1 uses one combined adjuster and no reservoirs, which suits road driving and occasional track days.

Can the Nitron Corvette NTR-R3 be rebuilt between seasons?

Yes. Every Nitron Corvette NTR-R3 damper is fully serviceable and rebuildable, including revalving and spring changes. Many track and race C4 owners have their dampers refreshed over the off-season, and revalving is common when moving to slicks, adding aero or changing class.

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Description

Nitron NTR-R3 Coilover Kit for C4 Chevrolet Corvette

Put a C4 on a track and you’ll find the rear axle tells you the most about the setup. Squeezing the throttle out of a slow corner shifts weight rearward. Every bump on a corner exit tests whether the rear tires stay planted or start to step out. The Nitron Corvette NTR-R3 coilover kit lets you handle both separately. Each corner has its own adjusters for rebound, low-speed compression and high-speed compression. Low-speed compression governs squat and body movement as power goes down. High-speed compression decides how the damper reacts to sharp hits and curbs. Tuning one no longer means compromising the other. Both transverse leaf springs come out and true coilovers go in, mounted in the factory locations with the OEM rear suspension layout retained. Hose-mounted reservoirs at all four corners put the compression adjusters where you can reach them between sessions. For a C4 built to run at the front of a track-day group or a club grid, the Nitron C4 Corvette NTR-R3 is the most adjustable Nitron setup available for the car.

Specialized Bi-Axis Hose Fittings

With reservoirs at both ends, the C4 has four hoses that each need a clean path from damper to reservoir. They have to clear the frame, brake lines and full suspension travel. Nitron’s exclusive Bi-Axis fittings swivel on two planes where each hose leaves the damper, so the hose starts out pointed in the right direction instead of being forced into a tight bend. On the Nitron Corvette NTR-R3, that makes routing far simpler at both the front and rear, and the hoses stay clear as the suspension moves through its full range.

Unique Technology

The Nitron NTR-R3 has won races and set lap records across international motorsport. A large-diameter piston and an ultra-strong piston rod are central to how it works. A larger piston pushes more oil through the valving with each movement, so every click on the adjusters produces a change you can actually feel, rather than one that disappears into the general feel of the car. On a C4 carrying wide tires and real mid-corner speed, that resolution is what lets you sort out entry understeer or exit oversteer one adjuster at a time. Each remote reservoir adds oil volume away from the damper body, and that keeps damping steady as heat builds. A Nitron Corvette NTR-R3 that felt right on your out-lap will still feel right at the end of a twenty-minute session.
- 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

Converting a C4 from leaf springs to coilovers opens up the setup, and Nitron builds each kit to make the most of it. Every Nitron Corvette NTR-R3 kit is assembled by hand once ordered. Springs and valving are specified around the car’s actual job, whether that means a street-registered car doing regular track days, a time-attack build on R-compound tires or a dedicated racer on slicks. Hard-anodized components and titanium hardware reduce weight and resist corrosion, which is good protection on a chassis this age. Nitron also builds these dampers to be looked after rather than replaced. Each Nitron NTR-R3 unit can be fully serviced and rebuilt, and revalving for new tires, more power or a different class keeps the kit matched to the car through every stage of its development.

Features

Hose reservoir type
OEM rear suspension 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, and hoses
Hand made to order

Specifications

Coilover Type: NTR-R3
Adjustment Type: 3-way independent
Adjustment: 16 clicks of high compression / 26 clicks of low compression / 24 clicks of rebound
Reservoir Type: Hose
Rear Suspension Type: OEM
Droplinks Included: No
Recommended Spring Rates:
- FRS – Fast Road Spec:
  - Front: 400lbs/inch (70N/mm)
  - Rear: 400lbs/inch (70N/mm)

Applications

Chevrolet Corvette: C4 | 1984-1996

Other Suspension Kits for C4 Corvette

Notes

Requires removing the factory front and rear transverse leaf springs
If your C4 Corvette is equipped with the factory Selective Ride Control option, which uses electronically adjustable shocks, please contact us directly before ordering
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 does 3-way adjustment do for a rear-drive C4 on track? The Nitron Corvette NTR-R3 lets you control how the car squats under power separately from how it handles bumps. Low-speed compression and rebound manage weight transfer on corner entry and exit. High-speed compression manages curbs and sharp hits. You can help the rear put power down out of slow corners without making it skittish over a rough exit.
How are the reservoirs mounted on the Nitron Corvette NTR-R3? The Nitron Corvette NTR-R3 uses hose-mounted reservoirs at all four corners, each connected to its damper by a hose. Nitron’s Bi-Axis fittings let each hose leave the damper at the right angle, which keeps routing clean at both ends of the car. Plan the reservoir locations before installation so the compression adjusters stay easy to reach.
Does the Nitron Corvette NTR-R3 remove the factory leaf springs? Yes. The Nitron Corvette NTR-R3 is a true coilover kit, so both transverse leaf springs are removed and each corner gets its own coil spring on the damper. The coilovers mount in the factory locations and the OEM rear suspension layout stays in place, so you gain ride height and corner-weight adjustment without fabricating new mounts.
Should a C4 owner choose the Nitron NTR-R3 or the Nitron NTR-R1? If the C4 is mainly a track, time-attack or race car, choose the Nitron NTR-R3. It adds independent rebound, low-speed compression and high-speed compression, plus remote reservoirs that keep damping consistent over long sessions. The Nitron NTR-R1 uses one combined adjuster and no reservoirs, which suits road driving and occasional track days.
Can the Nitron Corvette NTR-R3 be rebuilt between seasons? Yes. Every Nitron Corvette NTR-R3 damper is fully serviceable and rebuildable, including revalving and spring changes. Many track and race C4 owners have their dampers refreshed over the off-season, and revalving is common when moving to slicks, adding aero or changing class.

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 NTR-R3 Coilover Kit for C4 Chevrolet Corvette [NTCCH013R3]

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Nitron NTR-R3 Coilover Kit for C4 Chevrolet Corvette

Specialized Bi-Axis Hose Fittings

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for C4 Corvette

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews