Digital Dashboard Interface
DashBox
Connects your vehicle signals to RealDash digital dashboards via Bluetooth. Analog, digital and CAN inputs included.
Read more →Motorsport Electronics
Automotive electronics for motorsport and custom vehicles.
SP Leinonen builds practical electronics for race cars, project cars, tuners and custom builds — cleaner wiring, better control and direct integration.
Power Distribution Module
RealDash Interface
Battery Isolation Switch
Wireless Steering Wheel Buttons
Products
Each product is designed for reliable integration, cleaner wiring and motorsport-oriented control — without unnecessary complexity.
PDM / Power Distribution
PDSX-2
Programmable 16-channel power distribution module — replaces traditional fuse and relay setups with flexible electronic control.
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Battery Isolation Switch
PowerBox HC
Remote electronic battery isolation switch with auxiliary engine shutdown line — built for motorsport and demanding custom installations.
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Wireless Steering Wheel Controls
WirelessWheel
Wireless button system for steering wheels — no wiring through the column, 4 configurable output channels, compact transmitter with internal battery.
Read more →Applications
Designed for racing, tuning and custom builds where standard vehicle electronics no longer fit the project.
Race and track cars — cleaner switching, power management and dashboard integration.
Project cars and custom builds — modern control and simplified wiring for more flexibility.
ECU integration and tuning — CAN bus communication and sensor interfaces when everything needs to work together.
Safety-critical installations — remote battery isolation and dependable shutdown control where it counts.
What you get
Less wiring complexity — electronic control instead of traditional relay and fuse solutions.
Better integration — works with digital dashboards, CAN-based systems and aftermarket ECUs.
Real technical detail — full specifications so you can evaluate fit before buying, not after.
Practical installation focus — built for motorsport and serious enthusiast use, not consumer compromises.
Why SP Leinonen
These products are not generic consumer electronics. They are built for people who need real functions, understandable specifications and integration that actually works in a demanding environment.
Competitive pricing Motorsport-grade electronics at a fraction of the cost of many comparable solutions — without cutting corners on specification or integration.
Everything you need to know before buying Full specifications, connections and use cases for every product — so you can see straight away whether it fits your build.
Motorsport-oriented from the start Power control, remote isolation, steering wheel controls and dashboard integration — in one product family.
Interested in a product or have a question? Feel free to get in touch — info@spleinonen.com
About SP Leinonen
SP Leinonen is a Finnish company specialising in automotive electronics for motorsport, tuning and custom vehicles. The products are aimed at builders who need practical, well-specified solutions — not generic off-the-shelf compromises.
Technical Details
Every product ships with full technical documentation — connector pinouts, wiring diagrams and integration notes. Specifications are published openly so you can evaluate fit before you buy.
PDSX-2 PDM — 16 inputs / 16 outputs, 11×10 A + 5×20 A channels, 4 analog inputs (0–32 V), 12/24 V, CAN bus, Bluetooth, USB. Configurable current limits and cut-off per channel.
DashBox — 8 analog inputs (2×0–18 V, 2×0–5 V, 4×sensor/switch with 5 V pull-up), 7 digital inputs (0–18 V), ECU RPM, CAN bus, Bluetooth to RealDash on Android.
PowerBox HC — Electronic battery isolation switch rated to 450 A cranking current. Auxiliary engine shutdown line. M8 battery terminals. Remote control via low-current signal wire.
WirelessWheel — Wireless transmitter (49×29×13 mm, internal battery) and receiver. 4 configurable output channels (push button or toggle). 6×70 mm and 6×74 mm bolt patterns. 12 V receiver supply.
Where to buy
SP Leinonen products are available directly from us and through the following authorised resellers.
North Performance — Full SP Leinonen product range.
TT-Speed — PowerBox HC battery isolation switch.
Fullest Raceparts — Selected SP Leinonen products available on request.
Contact
Questions about products, availability or pricing? Get in touch — we'll get back to you promptly.