Does the Nitron F355 NTR-R1 coilover kit include adjustable top mounts?

Yes. Adjustable top mounts and race springs come standard with every Nitron NTR-R1 kit for the F355.

What kind of adjustment does the NTR-R1 offer?

Nitron's NTR-R1 coilovers uses a combined 2-way adjuster for compression and rebound at each corner, rather than independent high and low speed adjustment.

What kind of reservoir does this Nitron coilover kit use?

The R1 uses an internal reservoir built into the damper body, so there's no external hose or piggyback canister to route around the rear end.

Does this coilover kit affect the F355's factory suspension geometry?

No. The kit replaces the dampers, springs, and top mounts, it doesn't alter the unequal-length double wishbone geometry the car was built with.

How does the F355 NTR-R1 coilover kit compare to Nitron's R3 F355 kit?

The R3 adds independent high and low speed compression and rebound adjustment along with hose or piggyback reservoir options, while the R1 keeps things simpler with a single combined adjuster and an internal reservoir.

Can custom spring rates be ordered?

Yes. Every kit is custom built to order, and custom spring rates beyond the standard setup are available by contacting us directly for a consultation.

Description

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BP PRICING DIFFERENCE

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Description

Nitron NTR-R1 Coilover Kit for F129 Ferrari F355

Nitron’s F355 NTR-R1 coilover kit addresses a suspension setup that was already sharp when new but has had three decades to fall out of tune, and on a chassis built around unequal-length double wishbones at every corner, worn-out factory dampers show up in exactly the places a Ferrari owner notices first, turn-in, weight transfer under braking, and how settled the rear end feels coming out of a corner. The NTR-R1 coilover gives the F355 a 2-way combined compression and rebound adjuster at each corner, letting an owner dial in a single balanced setting rather than juggling separate high and low speed circuits. The internal reservoir design keeps everything self-contained in the damper body, no external hose or piggyback canister needed around a rear end already tight with the V8 and transaxle. Every Nitron kit includes adjustable top mounts and race springs, and it’s custom built and fully serviceable.

Unique Technology

Every Nitron shock goes through machining, inspection, and validation long before it’s called finished, with each component checked individually by a trained Nitron technician rather than sampled from a batch. The modular design behind Nitron’s NTR platform means this F355 application was built around what the chassis actually needs, not adapted from a part number developed for a different car. New materials, finishes, and processes only reach production after Nitron has thoroughly proven them out, and Nitron’s own engineering carries through the whole build instead of being layered onto something generic.
- 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 take a damper built for a heavier, front-engine GT car and adjust the valving until it works on an F355. Nitron’s NTR-R1 application is developed specifically for this chassis unequal-length double wishbone geometry at all four corners, accounting for the weight of a longitudinally mounted V8 sitting ahead of the transaxle rather than assuming it behaves like a Testarossa or 512 TR. That’s the difference between a Nitron kit built for this platform and one that was only ever adjusted to fit it.

Features

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 6 coilovers and top mounts
Hand made to order

Specifications

Coilover Type: NTR-R1
Adjustment Type: 2-way combined
Adjustment: 24 clicks combined
Rear Suspension Type: OEM
Droplinks Included: No
Recommended Spring Rates:
- FRS – Fast Road Spec:
  - Front: 350lbs/inch (61N/mm)
  - Rear: 400lbs/inch (70N/mm)

Applications

Ferrari F355: F129 | 1995-1999

Other Suspension Kits for the Ferrari F355

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

Does the Nitron F355 NTR-R1 coilover kit include adjustable top mounts? Yes. Adjustable top mounts and race springs come standard with every Nitron NTR-R1 kit for the F355.
What kind of adjustment does the NTR-R1 offer? Nitron’s NTR-R1 coilovers uses a combined 2-way adjuster for compression and rebound at each corner, rather than independent high and low speed adjustment.
What kind of reservoir does this Nitron coilover kit use? The R1 uses an internal reservoir built into the damper body, so there’s no external hose or piggyback canister to route around the rear end.
Does this coilover kit affect the F355’s factory suspension geometry? No. The kit replaces the dampers, springs, and top mounts, it doesn’t alter the unequal-length double wishbone geometry the car was built with.
How does the F355 NTR-R1 coilover kit compare to Nitron’s R3 F355 kit? The R3 adds independent high and low speed compression and rebound adjustment along with hose or piggyback reservoir options, while the R1 keeps things simpler with a single combined adjuster and an internal reservoir.
Can custom spring rates be ordered? Yes. Every kit is custom built to order, and custom spring rates beyond the standard setup are available by contacting us directly for a consultation.

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 F129 Ferrari F355 [NTCFE010R1]

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Nitron NTR-R1 Coilover Kit for F129 Ferrari F355

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for the Ferrari F355

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews