Hardrace underbody bracing package suitable for MX-5 ND, Fiat 124 Spider and Abarth 124 Spider with manual transmission. The combination of all the struts make the car incredibly good in terms of torsional rigidity and let the suspension do the work instead of the body twisting. The kit consists of a total of 5 individual items, which together support the entire underbody of the MX-5.
The stiffening by the struts is really considerable and its effect should not be underestimated. We were very impressed by the difference this kit made on our demonstration vehicle.
All underbody struts and braces are attached to the original points, so no drilling is necessary. Supplied complete with suitable mounting material.
We can install the kit for you.
Xtreme Clutch Stage 2 & Coolerworx Shifter
Our Coolerworx Shifter X-Clutch Kit provides the basis for your MX-5 to shift reliably and precisely in order to get the most out of every moment on the racetrack.
Xtreme Clutch Stage 2: This clutch impresses with its maximum power transmission and extreme resilience, which enables seamless and efficient power transmission even under the toughest conditions.
Coolerworx Shortshifter Thermoplastic: With precise and short shifting distances, every shift is an experience. The Coolerworx Shortshifter ensures a direct and responsive shifting feel, which is essential for fast lap times. Thanks to the thermo-neutral shift knob, it does not heat up when exposed to constant noise on the race track.
The interaction of these components guarantees an outstanding driving experience in which the shifting feel and control of the clutch mesh harmoniously for an incomparable racetrack experience.
We can install the kit for you and register all necessary parts with the TÜV.
For an appointment for installation, please contact us at termin@sps-motorsport.com
Time Attack Essential Kit
Ready for the ultimate Time Attack experience? Our parts package contains everything you need to start the GTAM Roadster Challenge with your MX-5.
OMP RT seat package or Recaro Pole Positon: Ergonomically designed seats that combine comfort and safety, complete with SPS seat consoles for a perfect fit.
SPS Track roll bar: For maximum safety and stability in every corner.
TRS 4-point belts: These belts ensure a secure hold and optimal freedom of movement while driving.
2kg fire extinguisher: Safety first. Our 2kg fire extinguisher for emergencies.
With this package you are well equipped when it comes to safety.
We can install the kit for you and register all necessary parts with the TÜV
For an appointment for installation, please contact us at termin@sps-motorsport.com
THE ROADSTER CHALLENGE IS A NEW RACING SERIES WITHIN
TIMEATTACK GERMANY, FEATURING FOUR CLASSES.
Imagine pushing your Roadster to the limit, battling on track against other
passionate Roadster drivers, and fighting for the fastest lap times — that’s
the Roadster Challenge! Here, you can prove your driving skills in an intense
time-attack format and show what you and your car are truly capable of. With
fair technical regulations that ensure the driver’s ability remains the key
factor, and attractive prizes for the fastest competitors, an unforgettable
motorsport experience awaits you. Are you ready to claim your spot on the
podium?
WHAT AWAITS YOU
Attractive
prizes at every race
Germany’s
best racetracks
6
race events
4
classes
Season
victory in each class awarded with a €1,000 shop voucher
Roadster Challenge Club NA
All classes are regulated by power-to-weight ratio, individually defined
for all generations: NA, NB, NBFL, NC, ND, and the 124 Spider. In the smallest
class, NA, NB, and NBFL models run at approximately 200 hp, while NC, ND, and
124 Spider models are limited to around 190 hp. This class is aimed at vehicles
that retain the original MX‑5 character, with modest performance upgrades and a
focus on near‑OEM design.
Roadster Challenge Club 2WD
This class allows vehicles with approximately 250 hp (NA/NB/NBFL) and 230
hp (NC/ND/124 Spider). Cars may run naturally aspirated engines, turbochargers,
or superchargers — as in all classes. More modifications are permitted compared
to Club NA, but the drivetrain must remain rear‑wheel drive.
Roadster Challenge Pro
The second‑highest performance class, also regulated by power-to-weight
ratio. NA/NB/NBFL models may run up to 330 hp, while NC/ND/124 Spider models
are limited to around 310 hp. Forced induction (turbo or supercharger) is
permitted.
Roadster Challenge Extreme
The highest‑performance class. NA/NB/NBFL models may run up to 450 hp, and
NC/ND/124 Spider models up to 420 hp. Forced induction is allowed, and this
class offers the widest range of modification options.
TRACKS & DATES
Date
Track
Event
11 April 2026
Hockenheimring
Tuning Masters
05–07 June 2026
Motorsport Arena Oschersleben
Fast Car Festival
30 July – 02 August 2026
Lausitzring
Reisbrennen
22–23 August 2026
Salzburgring
Oldtimer Festival
12–13 September 2026
TT Circuit Assen
ADAC Hansa Racing Weekends
Finale: 11 October 2026
Nürburgring Grand Prix
EU TimeAttack Masters & TuningMasters
Early bird registration and payment until February 28, 2026
Registration and payment from March 1, 2026 (€2699)📧 roadster.challenge@sps-motorsport.com
For any questions regarding the Roadster Challenge, feel free to contact us
at the same email address. The regulations and entry form can also be found
under Downloads.
THE ROADSTER CHALLENGE IS A NEW RACING SERIES WITHIN
TIMEATTACK GERMANY, FEATURING FOUR CLASSES.
Imagine pushing your Roadster to the limit, battling on track against other
passionate Roadster drivers, and fighting for the fastest lap times — that’s
the Roadster Challenge! Here, you can prove your driving skills in an intense
time-attack format and show what you and your car are truly capable of. With
fair technical regulations that ensure the driver’s ability remains the key
factor, and attractive prizes for the fastest competitors, an unforgettable
motorsport experience awaits you. Are you ready to claim your spot on the
podium?
WHAT AWAITS YOU
Attractive
prizes at every race
Germany’s
best racetracks
6
race events
4
classes
Season
victory in each class awarded with a €1,000 shop voucher
Roadster Challenge Club NA
All classes are regulated by power-to-weight ratio, individually defined
for all generations: NA, NB, NBFL, NC, ND, and the 124 Spider. In the smallest
class, NA, NB, and NBFL models run at approximately 200 hp, while NC, ND, and
124 Spider models are limited to around 190 hp. This class is aimed at vehicles
that retain the original MX‑5 character, with modest performance upgrades and a
focus on near‑OEM design.
Roadster Challenge Club 2WD
This class allows vehicles with approximately 250 hp (NA/NB/NBFL) and 230
hp (NC/ND/124 Spider). Cars may run naturally aspirated engines, turbochargers,
or superchargers — as in all classes. More modifications are permitted compared
to Club NA, but the drivetrain must remain rear‑wheel drive.
Roadster Challenge Pro
The second‑highest performance class, also regulated by power-to-weight
ratio. NA/NB/NBFL models may run up to 330 hp, while NC/ND/124 Spider models
are limited to around 310 hp. Forced induction (turbo or supercharger) is
permitted.
Roadster Challenge Extreme
The highest‑performance class. NA/NB/NBFL models may run up to 450 hp, and
NC/ND/124 Spider models up to 420 hp. Forced induction is allowed, and this
class offers the widest range of modification options.
TRACKS & DATES
Date
Track
Event
11 April 2026
Hockenheimring
Tuning Masters
05–07 June 2026
Motorsport Arena Oschersleben
Fast Car Festival
30 July – 02 August 2026
Lausitzring
Reisbrennen
22–23 August 2026
Salzburgring
Oldtimer Festival
12–13 September 2026
TT Circuit Assen
ADAC Hansa Racing Weekends
Finale: 11 October 2026
Nürburgring Grand Prix
EU TimeAttack Masters & TuningMasters
The entry form is automatically sent with your purchase. It must be
completed and returned to us. 📧 roadster.challenge@sps-motorsport.com
For any questions regarding the Roadster Challenge, feel free to contact us
at the same email address. The regulations and entry form can also be found
under Downloads.
All products, including the service package offered here, are developed by SPS Motorsport on the racetrack, adapted for the road, and constantly improved. We place the utmost importance on the quality of the installed parts and their functionality.
In our supercharger stage, we install a Rotrex C30-94 supercharger CCW including accessories to increase the power to 230HP/240Nm (ND1) and 256HP/265Nm (ND2). To keep the thermal conditions under control, we strongly recommend our MX-5 ND cooling package. A special performance clutch is always included in the package. Additionally, the package includes Motalin 5W-50 HP Sport (including a new oil filter).
The products can be installed by us. During installation, the control unit is adjusted and tuned on our test bench and on the road (test bench protocol included). Finally, the conversion is approved and TÜV registered.
Note: The power is only achieved when our header catalytic converter combination with our Group A exhaust system is installed. Registration is only possible in combination with these components or an exhaust system with EC type approval!If you already have some of these installed in your ND, you can simply deselect the corresponding options in the dropdown menu.
The kit cannot be combined with the Whiteline Performance sway bar kit but only fits with the Hardrace sway bar kit!
RecommendationsFor existing Piper Cams camshafts we recommend an 85mm pulley.
For track use or heavy loads, we recommend an NC gearbox conversion.
Development All performance packages are configured in-house. Whether you opt for light naturally aspirated tuning, individual throttle body conversion, or turbo conversion, the choice is yours. We use all products in our vehicles. All our race cars use parts from our performance packages. It was important to us during the development of the performance packages that they meet our customers' requirements, that the power delivery and the appearance in the engine bay are as close to stock as possible. All performance packages we sell can be registered and approved in-house (registration included in the installation price). We rely on what we consider to be the best components in the scene.
Support All performance packages installed by us receive lifetime support. Since we use and drive the products ourselves, as well as on the racetrack, we can help with almost any problem. If you have questions, ask us!
Components
Rotrex C30-94 supercharger kit
ND1: Xtreme Clutch Stage 1
ND2: Goldseries Performance Clutch
Motalin 5W-50 HP Sport + oil filter
SPS Motorsport Catch Can Kit MX-5 ND
ND1: License EcuTek Race Rom ND
ND2: VersaTuner Lite license including tune for the supercharger conversion
Mounting material
Optional
Cooling package MX-5 ND
SPS Motorsport Group A system MX-5 ND (necessary for registration)
SPS Motorsport header with catalytic converter MX-5 ND 2.0L G160/G184 (necessary for registration)
Installation of selected components
Tuning and adjustment on our in-house test bench and on the road, performance measurement on our test bench with subsequent protocol and TÜV registration.
For an appointment for installation, please contact us at termin@sps-motorsport.com