What does the 993 NTR-R1 Coilover Kit change over the stock suspension?

It replaces the factory springs and dampers at all four corners with Nitron’s NTR-R1 coilover units, adding adjustable damping, adjustable ride height, and firmer race springs.

How is the Nitron NTR-R1 different from the Nitron RoadSport for the 993?

The Nitron NTR-R1 is tuned for harder driving, with race springs and adjustable top mounts, while the Nitron RoadSport is the road-oriented option that keeps the factory top mounts.

What kind of adjustment does the Nitron NTR-R1 offer?

Combined compression and rebound adjustment at each corner, along with independent ride height adjustment through the spring perches. The reservoir is internal, so there is no remote reservoir to mount or route.

Does the Nitron NTR-R1 work with the factory rear suspension on the 993?

Yes. The kit works with the factory multi-link rear layout, so the rear arms, mounting points, and geometry stay as Porsche designed them.

Which 993 models does the Nitron NTR-R1 fit?

The Carrera, Carrera 4, GT2, Turbo, and Turbo S variants of the 993-generation Porsche 911.

Can I get custom spring rates for my specific setup?

Yes. Every kit is hand assembled to order, and custom spring rates outside the standard range are available by contacting us directly.

Description

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Description

Nitron NTR-R1 Coilover Kit for 993 Porsche 911 Carrera, Carrera 4, GT2, Turbo, and Turbo S

The Nitron 993 NTR-R1 Coilover Kit is for the 993 owner who has moved past worn factory dampers and wants a setup built for pushing the car, without the cost or complexity of a full remote-reservoir race package. The 993 is the last air-cooled 911, and it rewards a driver who gives it real inputs, but tired OEM dampers and soft springs let the body roll and pitch well before the tires are anywhere near their limit. That shows up as slow turn-in, a rear end that unloads over crests, and a front end that dives more than it should under braking, which makes the car feel less predictable the harder it’s driven. Nitron’s NTR-R1 addresses that with firmer race-rated springs, a damper with enough control to manage them, and adjustable top mounts that open up alignment options for a car being driven harder. It sits above the Nitron RoadSport in intent, trading a bit of the road-biased compliance for sharper response and more adjustability, but stays simple, with a single set of controls at each corner and an internal reservoir that keeps the dampers compact. The 993 was the first 911 to move to a multi-link rear axle with coil springs, and the Nitron NTR-R1 works with that factory rear layout, so the front and rear are both covered across the Carrera, Carrera 4, GT2, Turbo, and Turbo S. It suits an owner who wants a dependable, tunable platform for spirited road driving and regular track days rather than a dedicated race build.

Unique Technology

Each Nitron NTR-R1 damper is a monotube design pressurized with nitrogen gas, which keeps the oil from aerating and holds damping consistent as the dampers heat up over a long session. The valving was developed through motorsport work and then tuned for the weight and spring rates of a 993 rather than taken from a generic 911 curve, with 2-way combined compression and rebound adjustment at each corner so the car can be dialed toward firmer or softer without pulling anything apart.
- 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

Every Nitron 993 NTR-R1 Coilover Kit is hand assembled to order in the UK. Spring rates and valving are set to match how the car will be used, whether that’s mostly spirited road driving or regular track days, and custom spring rates are available for owners who want to shift the balance of the car one way or the other.

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, and top mounts
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: 457lbs/inch (80N/mm)
  - Rear: 685lbs/inch (120N/mm)

Applications

Porsche 911 Carrera: 993 | 1994-1998
Porsche 911 Carrera 4: 993 | 1994-1998
Porsche 911 GT2: 993 | 1995
Porsche 911 Turbo: 993 | 1995-1998
Porsche 911 Turbo S: 993 | 1997-1998

Other Suspension Kits for 993 Carrera / GT2 / Turbo

Notes

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.
Precision bearing spacers supplied as required

Frequently Asked Questions

What does the 993 NTR-R1 Coilover Kit change over the stock suspension? It replaces the factory springs and dampers at all four corners with Nitron’s NTR-R1 coilover units, adding adjustable damping, adjustable ride height, and firmer race springs.
How is the Nitron NTR-R1 different from the Nitron RoadSport for the 993? The Nitron NTR-R1 is tuned for harder driving, with race springs and adjustable top mounts, while the Nitron RoadSport is the road-oriented option that keeps the factory top mounts.
What kind of adjustment does the Nitron NTR-R1 offer? Combined compression and rebound adjustment at each corner, along with independent ride height adjustment through the spring perches. The reservoir is internal, so there is no remote reservoir to mount or route.
Does the Nitron NTR-R1 work with the factory rear suspension on the 993? Yes. The kit works with the factory multi-link rear layout, so the rear arms, mounting points, and geometry stay as Porsche designed them.
Which 993 models does the Nitron NTR-R1 fit? The Carrera, Carrera 4, GT2, Turbo, and Turbo S variants of the 993-generation Porsche 911.
Can I get custom spring rates for my specific setup? Yes. Every kit is hand assembled to order, and custom spring rates outside the standard range are available by contacting us directly.

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 993 Porsche 911 Carrera, Carrera 4, GT2, Turbo, and Turbo S [NTCPO020R1]

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Nitron NTR-R1 Coilover Kit for 993 Porsche 911 Carrera, Carrera 4, GT2, Turbo, and Turbo S

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for 993 Carrera / GT2 / Turbo

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews