Does the Nitron Corvette NTR-R1 replace the C4 leaf springs?

Yes. The Nitron Corvette NTR-R1 is a true coilover kit, so both factory transverse leaf springs are removed and each corner gets its own coil spring mounted on the damper. That gives the C4 independent ride height adjustment at every corner and spring rates chosen for the car, instead of the single fixed rate built into each leaf spring.

Why convert a C4 Corvette from leaf springs to coilovers?

A single transverse leaf spring spans each axle, which limits ride height adjustment, spring rate choice and corner weighting. Converting to the Nitron Corvette NTR-R1 lets you set ride height separately at each corner, balance the car’s weight properly and run spring rates matched to your tires and driving. The result is a C4 that is easier to tune and more consistent at the limit.

Does the Nitron Corvette NTR-R1 change the C4 rear suspension geometry?

No. The Nitron Corvette NTR-R1 coilovers mount in the factory locations and keep the OEM rear suspension layout. The rear links and their geometry stay as Chevrolet designed them. Only the springing and damping change, which keeps the install manageable and avoids fabrication work on the chassis.

How does the combined 2-way adjuster on the Nitron NTR-R1 work?

Each Nitron NTR-R1 damper has a single adjuster that changes bump and rebound together along a curve Nitron sets for the car. Go firmer and both directions stiffen; go softer and both relax. That makes it easy to move between a comfortable road setting and a firmer track setting without balancing separate damping circuits.

Can the Nitron Corvette NTR-R1 be serviced and revalved?

Yes. Every Nitron Corvette NTR-R1 damper is fully serviceable, so it can be rebuilt after heavy use or revalved and re-sprung as the car develops. Stickier tires, more power or a move into autocross or road-course competition are all good reasons to revisit the setup.

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Description

Nitron NTR-R1 Coilover Kit for C4 Chevrolet Corvette

On a C4, the transverse composite leaf springs limit what you can do with the chassis. Ride height adjustment is crude. Spring rate is whatever Chevrolet chose. And the car’s balance can’t be truly corner-weighted when a single spring spans the whole axle. The Nitron Corvette NTR-R1 coilover kit removes both leaf springs and puts a true coilover at each corner, which gives you independent ride height adjustment and spring rates chosen for the way the car is actually driven. The coilovers mount in the factory locations, and the rear suspension keeps its OEM layout, so the C4’s geometry stays as Chevrolet designed it. Damping comes from one adjuster per corner that sets bump and rebound together. That keeps setup simple whether the Nitron C4 Corvette NTR-R1 is heading for a canyon road or a road course. It’s a fundamental change to how the car is sprung, and it fixes the C4’s oldest chassis limitation.

Unique Technology

The Nitron NTR-R1 is built from Nitron’s full race program and shares much of its internal hardware with the NTR-R3 used in international motorsport. Where the NTR-R1 differs is packaging. It has no remote canister, which keeps each corner compact and the install free of hose routing. Low-friction internals let the damper respond to small inputs instead of resisting them, so the Nitron Corvette NTR-R1 tracks uneven pavement rather than skipping across it. That control counts on a wide-tired car that can carry real speed through a corner. The dampers also resist fade, and the setting you choose at the start of a session holds as the oil heats up over repeated hard laps.
- 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

Switching from leaf springs to coilovers is exactly the kind of change that calls for a kit built around the individual car. Each Nitron Corvette NTR-R1 kit is assembled by hand after it’s ordered. Springs and valving are specified for how that C4 will be used, whether that’s a weekend driver, a track-day car on sticky tires or a dedicated autocross build. Hard-anodized and titanium-finish components keep the weight down and resist corrosion, which matters on a chassis that is now decades old. When the car changes, the kit can change with it. Every Nitron NTR-R1 damper can be fully serviced and revalved, so new tires, more power or a move to more serious competition never leaves the suspension out of step with the rest of the build.

Features

OEM rear suspension type
Internal reservoir type
2-way combined adjustment
Full alloy body
Preload adjuster
Combined 24 clicks of adjustment
Nitrogen gas charged
Precision bearing spacers supplied as required
Consists of 4 coilovers
Hand made to order

Specifications

Coilover Type: NTR-R1
Adjustment Type: 2-way combined
Adjustment: 24 clicks combined
Rear Suspension Types: 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 feel free to 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.
Precision bearing spacers supplied as required

Frequently Asked Questions

Does the Nitron Corvette NTR-R1 replace the C4 leaf springs? Yes. The Nitron Corvette NTR-R1 is a true coilover kit, so both factory transverse leaf springs are removed and each corner gets its own coil spring mounted on the damper. That gives the C4 independent ride height adjustment at every corner and spring rates chosen for the car, instead of the single fixed rate built into each leaf spring.
Why convert a C4 Corvette from leaf springs to coilovers? A single transverse leaf spring spans each axle, which limits ride height adjustment, spring rate choice and corner weighting. Converting to the Nitron Corvette NTR-R1 lets you set ride height separately at each corner, balance the car’s weight properly and run spring rates matched to your tires and driving. The result is a C4 that is easier to tune and more consistent at the limit.
Does the Nitron Corvette NTR-R1 change the C4 rear suspension geometry? No. The Nitron Corvette NTR-R1 coilovers mount in the factory locations and keep the OEM rear suspension layout. The rear links and their geometry stay as Chevrolet designed them. Only the springing and damping change, which keeps the install manageable and avoids fabrication work on the chassis.
How does the combined 2-way adjuster on the Nitron NTR-R1 work? Each Nitron NTR-R1 damper has a single adjuster that changes bump and rebound together along a curve Nitron sets for the car. Go firmer and both directions stiffen; go softer and both relax. That makes it easy to move between a comfortable road setting and a firmer track setting without balancing separate damping circuits.
Can the Nitron Corvette NTR-R1 be serviced and revalved? Yes. Every Nitron Corvette NTR-R1 damper is fully serviceable, so it can be rebuilt after heavy use or revalved and re-sprung as the car develops. Stickier tires, more power or a move into autocross or road-course competition are all good reasons to revisit the setup.

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-R1 Coilover Kit for C4 Chevrolet Corvette [NTCCH013R1]

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Nitron NTR-R1 Coilover Kit for C4 Chevrolet Corvette

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for C4 Corvette

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews