Why retain the OEM top mounts on the 996 Turbo and Carrera 4 variants?

These models are heavier and more road-focused than the base Carrera, and the factory top mounts are engineered to manage the noise and vibration characteristics that come with that. Replacing them with aftermarket alternatives typically introduces NVH trade-offs that work against the daily usability these cars are built around. Retaining them means the RoadSport kit improves chassis response without making the car less livable on the road.

How does the RoadSport differ from the NTR-R1?

The RoadSport is built specifically around road use with occasional track capability, retaining the OEM top mounts and running without a remote canister for a clean, straightforward installation. The NTR-R1 is a more performance-oriented package better suited to drivers who spend meaningful time on circuit. If the car is primarily a road car, the RoadSport is the right starting point.

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Description

Nitron RoadSport Coilover Kit for 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S

The 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S are cars that get used, and the Nitron RoadSport coilover kit is built around that reality. It’s developed for drivers who want a meaningful suspension upgrade for the road without giving up the comfort and refinement these cars were designed to deliver, while still having the capability to hold up on track when the opportunity comes up. The kit retains the OEM top mounts to preserve factory levels of comfort and noise isolation, and runs without a remote canister to keep installation clean and straightforward. Every unit is hand-built with ultra-low friction components for consistent, fade-resistant damping across a wide and easy to use adjustment range. Ultra high-grade materials and hard-anodised titanium finish parts keep corrosion out and weight down, and each kit is custom built, custom sprung, and fully serviceable; built to handle not just season after season, but the kind of year-round use that includes harsh winter conditions.

Unique Technology

Nitron builds every shock from precision components that go through a rigorous design and development process well before the unit reaches final assembly. The modular construction gives engineers the flexibility to work through each application properly without cutting corners on how parts are made or how they perform together under real load. Everything is machined to tight tolerances and checked individually by trained technicians; that level of quality control isn’t concentrated at the end of the process, it runs through all of it. New materials, finishes, and processes are put through extensive validation before they’re brought into production, with proprietary Nitron technologies integrated throughout to produce shocks that hold their own against the competition on road and track alike. That discipline in engineering is what the brand has stood on since day one.

Bespoke Engineering

Nitron doesn’t start with a generic damper and reverse engineer a fit for the 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S. Every application is developed from scratch, with components, spring rates, and damping characteristics built around the specific platform rather than adapted from something in the same ballpark. The geometry, weight distribution, and suspension travel of each variant are factored into the design from the beginning, not addressed as afterthoughts. That’s the gap between a kit that happens to fit a car and one that was actually engineered for it.

Features

Fully serviceable design for long-term use
Combined 24-clicks for precise adjustment
Nitrogen gas charged
Preload adjuster
Form spring with use of OEM top mount
Consists of 4 coilover assemblies
Hand made to order

Specifications

Coilover Type: RoadSport
Adjustment Type: 2-way combined
Adjustment: 24 clicks combined
Rear Suspension Type: OEM
- FRS – Fast Road Spec:
  - Front: 70N/mm
  - Rear: 120N/mm

Applications

Porsche 911 Carrera 4: 996 | 1997-2005
Porsche 911 Carrera 4S: 996 | 2002-2005
Porsche 911 Turbo: 996 | 2001-2005
Porsche 911 Turbo S: 996 | 2005

Other Suspension Kits for 997 C4, C4S, Turbo, and Turbo S

NTR-R1 Coilover Kit
NTR-R1 Coilover Kit w/ Standalone FAL
NTR-R3 Coilover Kit
NTR-R3 Coilover Kit w/ Standalone FAL
elec-TRON RoadSport Coilover Kit
elec-TRON R1 Coilover Kit
elec-TRON R1 Coilover Kit w/ Standalone FAL
elec-TRON R3 Coilover Kit
elec-TRON R3 Coilover Kit w/ Standalone FAL

Notes

Fits AWD models only
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

Why retain the OEM top mounts on the 996 Turbo and Carrera 4 variants? These models are heavier and more road-focused than the base Carrera, and the factory top mounts are engineered to manage the noise and vibration characteristics that come with that. Replacing them with aftermarket alternatives typically introduces NVH trade-offs that work against the daily usability these cars are built around. Retaining them means the RoadSport kit improves chassis response without making the car less livable on the road.
How does the RoadSport differ from the NTR-R1? The RoadSport is built specifically around road use with occasional track capability, retaining the OEM top mounts and running without a remote canister for a clean, straightforward installation. The NTR-R1 is a more performance-oriented package better suited to drivers who spend meaningful time on circuit. If the car is primarily a road car, the RoadSport is the right starting point.

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 RoadSport Coilover Kit for 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S [NTCPO027RS]

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Nitron RoadSport Coilover Kit for 996 Porsche 911 Carrera 4, Carrera 4S, Turbo, and Turbo S

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for 997 C4, C4S, Turbo, and Turbo S

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews