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BBR MX-5 ND to NC Gearbox Conversion Set

Product information "BBR MX-5 ND to NC Gearbox Conversion Set"

The gearbox of the Mazda MX-5 ND can unfortunately only be described as a weak link. Mazda themselves have released many revisions due to failures, and even the latest version of the gearbox is certainly not robust enough for longer track use or greatly increased torque.

Our answer is, just as Fiat decided with their turbocharged 124s with higher torque, to use the well-proven gearbox of the Mazda MX-5 NC.

This is a complete conversion kit that includes tapered and parallel locating studs, allowing a Mazda MX-5 NC 6-speed gearbox (not included) to directly replace the MX-5 ND unit. The Power Plant frame is directly bolted to the NC gearbox, and the original ND driveshaft is used without modification. This way, the gearbox in the ND can withstand up to 300 HP and 350 NM.

Included parts:

  • Clear anodized billet aluminum adapter plate

  • Lightweight billet steel adapter flywheel including pilot bearing

  • Aluminum dust cover plate

  • All required fasteners

  • Installation diagram

Notes / additional requirements:

  • A 6-speed clutch of the Mazda MX-5 NC is required.

  • An NC slave cylinder of the MX-5 is required, and the hydraulic line of the MX-5 ND clutch must be adapted.

  • We recommend a shorter final drive ratio.

  • The gearbox tunnel of the MX-5 ND needs to be deformed (dented a few mm) to clear the MX-5 NC clutch fork lever.

  • A small section of the NC gearbox needs to be removed to clear the starter motor of the MX-5 ND, and a dust cover is provided.

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Single Registration at SPS
Performance Package ND1 2.0 SG205
Installation: Installation & TÜV | components: Exhaust manifold incl. catalytic converter
This performance package is developed by SPS Motorsport on the racetrack, adapted for street use, and continuously refined. All components are engineered in-house and used in our own race cars — delivering maximum performance, uncompromising quality, and a clean, OEM-like engine bay appearance. Power Upgrade to 205 HP In Stage 2, we install a high-flow SPS Motorsport header with integrated sports catalytic converter, along with a set of Piper Cams performance camshafts. The cam timing is precisely adjusted to ensure optimal power delivery and high-revving response. Note: Full power output is only achieved when paired with an exhaust system featuring a minimum pipe diameter of 55 mm. We recommend our Group A exhaust system, which can be added as an accessory during checkout. TÜV registration is only possible with this configuration. Two Options – Parts Package or Full Installation You can choose between two configurations: Parts Package (without installation): Receive all components for self-installation. No tuning, dyno protocol, or TÜV registration included. Full Installation (with tuning & registration): All components are professionally installed at SPS Motorsport. The ECU is then individually calibrated on our in-house dyno and on the road — including a dyno protocol. Finally, the entire conversion is inspected and officially registered at our facility. TÜV registration⚠️ This performance package can be combined with these exhaust systems:Friedrich Motorsport Group AFox/SPS Group AFor other exhaust systems please contact us in advance via email, so we can check first whether a TÜV registration is possible.Developed with Motorsport DNA All performance packages are modular and upgradeable — whether you're aiming for a lightweight NA setup, individual throttle bodies, or a turbo conversion. We use only proven components that have earned their place on the racetrack. Engine bay aesthetics remain clean and close to OEM. Lifetime Support Every performance package installed by us comes with lifetime support. Since we use these products ourselves — on the road and on track — we can help with nearly any issue. Got questions? Just ask! Configuration Notes If you already have a compatible header and sports cat installed, select the option “Without Header/Cat” during checkout. All components are also available individually — feel free to contact us for custom setups. Included Services (with installation option) Installation of header and sports catalytic converter Installation of camshafts Cam timing adjustment ECU calibration on dyno and road Dyno run with performance protocol TÜV registration at SPS Motorsport Included Components SPS Motorsport Header MX-5 ND with Sports Cat Piper Cams Performance Camshafts High-quality gaskets and installation hardware

€7,556.10* €8,490.00* (11% saved)
%
Single Registration at SPS
Performance Package ND2 2.0 SG220
Installation: Installation & TÜV | components: Exhaust manifold incl. catalytic converter
This performance package was developed by SPS Motorsport on the racetrack, adapted for street use, and continuously refined. All components are engineered in-house and used in our own race cars — delivering maximum performance, uncompromising quality, and a clean, OEM-like engine bay appearance. Two Options – Parts Package or Full Installation You can choose between two configurations: Parts Package (without installation): Receive all components for self-installation. ECU tuning, dyno protocol, and TÜV registration are not included. Full Installation (with tuning & registration): All components are professionally installed at SPS Motorsport. The ECU is then individually calibrated on our in-house dyno and on the road — including a dyno protocol. Finally, the entire conversion is inspected and officially registered at our facility. Power Upgrade to 220 HP In Stage 2, we install a high-flow SPS Motorsport header with integrated sports catalytic converter, along with a set of Piper Cams performance camshafts. Cam timing is precisely adjusted to ensure optimal power delivery and high-revving response. Note: Full power output is only achieved when paired with an exhaust system featuring a minimum pipe diameter of 55 mm.  TÜV registration⚠️ This performance package can be combined with these exhaust systems:Friedrich Motorsport Group AFox/SPS Group AFor other exhaust systems please contact us in advance via email, so we can check first whether a TÜV registration is possible. Developed with Motorsport DNA All performance packages are designed in-house and built to be upgradeable — whether you're aiming for a lightweight NA setup, individual throttle bodies, or a turbo conversion. We use only proven components that have earned their place on the racetrack. Engine bay aesthetics remain clean and close to OEM. Upgradeable & Modular Our packages are modular and future-proof. If you decide to upgrade later, we’ll provide the necessary support and guidance to expand your setup. Lifetime Support Every performance package installed by us comes with lifetime support. Since we use these products ourselves — on the road and on track — we can help with nearly any issue. Got questions? Just ask! Configuration Notes If you already have a compatible header and sports cat installed, select the option “Without Header/Cat” during checkout. All components are also available individually — feel free to contact us for custom setups. Included Services (with installation option) Installation of header and sports catalytic converter Installation of camshafts Cam timing adjustment ECU calibration on dyno and road Dyno run with performance protocol TÜV registration at SPS Motorsport Included Components SPS Motorsport Header MX-5 ND with Sports Cat Piper Cams Performance Camshafts High-quality gaskets and installation hardware

€7,556.10* €8,490.00* (11% saved)
%
Single Registration at SPS
Performance parts package ND1 2.0 SG205
Installation: Without installation | components: Exhaust manifold incl. catalytic converter
This performance package is developed by SPS Motorsport on the racetrack, adapted for street use, and continuously refined. All components are engineered in-house and used in our own race cars — delivering maximum performance, uncompromising quality, and a clean, OEM-like engine bay appearance. Power Upgrade to 205 HP In Stage 2, we install a high-flow SPS Motorsport header with integrated sports catalytic converter, along with a set of Piper Cams performance camshafts. The cam timing is precisely adjusted to ensure optimal power delivery and high-revving response. Note: Full power output is only achieved when paired with an exhaust system featuring a minimum pipe diameter of 55 mm. We recommend our Group A exhaust system, which can be added as an accessory during checkout. TÜV registration is only possible with this configuration. Two Options – Parts Package or Full Installation You can choose between two configurations: Parts Package (without installation): Receive all components for self-installation. No tuning, dyno protocol, or TÜV registration included. Full Installation (with tuning & registration): All components are professionally installed at SPS Motorsport. The ECU is then individually calibrated on our in-house dyno and on the road — including a dyno protocol. Finally, the entire conversion is inspected and officially registered at our facility. TÜV registration⚠️ This performance package can be combined with these exhaust systems:Friedrich Motorsport Group AFox/SPS Group AFor other exhaust systems please contact us in advance via email, so we can check first whether a TÜV registration is possible.Developed with Motorsport DNA All performance packages are modular and upgradeable — whether you're aiming for a lightweight NA setup, individual throttle bodies, or a turbo conversion. We use only proven components that have earned their place on the racetrack. Engine bay aesthetics remain clean and close to OEM. Lifetime Support Every performance package installed by us comes with lifetime support. Since we use these products ourselves — on the road and on track — we can help with nearly any issue. Got questions? Just ask! Configuration Notes If you already have a compatible header and sports cat installed, select the option “Without Header/Cat” during checkout. All components are also available individually — feel free to contact us for custom setups. Included Services (with installation option) Installation of header and sports catalytic converter Installation of camshafts Cam timing adjustment ECU calibration on dyno and road Dyno run with performance protocol TÜV registration at SPS Motorsport Included Components SPS Motorsport Header MX-5 ND with Sports Cat Piper Cams Performance Camshafts High-quality gaskets and installation hardware

€5,331.10* €5,990.00* (11% saved)
%
Single Registration at SPS
Performance parts package ND2 2.0 SG220
Installation: Without installation | components: Exhaust manifold incl. catalytic converter
This performance package was developed by SPS Motorsport on the racetrack, adapted for street use, and continuously refined. All components are engineered in-house and used in our own race cars — delivering maximum performance, uncompromising quality, and a clean, OEM-like engine bay appearance. Two Options – Parts Package or Full Installation You can choose between two configurations: Parts Package (without installation): Receive all components for self-installation. ECU tuning, dyno protocol, and TÜV registration are not included. Full Installation (with tuning & registration): All components are professionally installed at SPS Motorsport. The ECU is then individually calibrated on our in-house dyno and on the road — including a dyno protocol. Finally, the entire conversion is inspected and officially registered at our facility. Power Upgrade to 220 HP In Stage 2, we install a high-flow SPS Motorsport header with integrated sports catalytic converter, along with a set of Piper Cams performance camshafts. Cam timing is precisely adjusted to ensure optimal power delivery and high-revving response. Note: Full power output is only achieved when paired with an exhaust system featuring a minimum pipe diameter of 55 mm.  TÜV registration⚠️ This performance package can be combined with these exhaust systems:Friedrich Motorsport Group AFox/SPS Group AFor other exhaust systems please contact us in advance via email, so we can check first whether a TÜV registration is possible. Developed with Motorsport DNA All performance packages are designed in-house and built to be upgradeable — whether you're aiming for a lightweight NA setup, individual throttle bodies, or a turbo conversion. We use only proven components that have earned their place on the racetrack. Engine bay aesthetics remain clean and close to OEM. Upgradeable & Modular Our packages are modular and future-proof. If you decide to upgrade later, we’ll provide the necessary support and guidance to expand your setup. Lifetime Support Every performance package installed by us comes with lifetime support. Since we use these products ourselves — on the road and on track — we can help with nearly any issue. Got questions? Just ask! Configuration Notes If you already have a compatible header and sports cat installed, select the option “Without Header/Cat” during checkout. All components are also available individually — feel free to contact us for custom setups. Included Services (with installation option) Installation of header and sports catalytic converter Installation of camshafts Cam timing adjustment ECU calibration on dyno and road Dyno run with performance protocol TÜV registration at SPS Motorsport Included Components SPS Motorsport Header MX-5 ND with Sports Cat Piper Cams Performance Camshafts High-quality gaskets and installation hardware

€5,331.10* €5,990.00* (11% saved)
Single Registration at SPS
Performance Package ND1/ ND2 2.0 SC250
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

From €8,891.10*