3D Model Library
SurLok Busbar + Block
Laser Cut Files (4 Gauge / SurLok Plus)
by Cole GentryThese files are provided as-is and are not certified for road use. You are responsible for verifying any part's strength, fit, and suitability before fitting it to a vehicle. Classic Mini DIY and the model's author accept no liability for printed parts.
License
Public domain. You may copy, modify, and use this for any purpose, including commercially, with no restrictions and no need to credit the creator. Full dedication: https://creativecommons.org/publicdomain/zero/1.0/
About this model
This one isn't mine — it was designed by my good friend Elliot Stringer, who's kindly given me permission to share it with the community. If you find it useful, go give him a follow: @rsp_turbo on Instagram. This listing includes both the busbar and the mounting block, supplied as laser-cut files, designed around Amphenol SurLok Plus connectors for 4 gauge (4 AWG / 25mm²) cable. SurLok Plus is the go-to for clean, high-current power distribution — quick-lock, press-to-release connectors rated for serious amperage, so you can make and break heavy power connections fast and reliably without bolt lugs and spanners. That makes a busbar like this ideal for motorsport, EV, turbo, and custom automotive wiring where you want a tidy, serviceable common power or ground point. The design is built specifically around the connector set below, with red (positive) and black (negative) parts so you can colour-code your distribution properly. Get the laser-cut parts made up, source the connectors, and you've got a professional-grade power distribution block. Connector BOM (Amphenol SurLok Plus, via DigiKey): 4× SLPPA25BSR — cable plug, 4 AWG crimp, red 4× SLPPA25BSB — cable plug, 4 AWG crimp, black 5× SLPRATPSR — receptacle, threaded, red 5× SLPRATPSB — receptacle, threaded, black Notes: These files are laser-cut designs, not 3D prints — have them cut in the appropriate material for your application (the busbar in particular needs a suitable conductive material rated for your current; the block to suit your mounting). Connectors are sized for 4 AWG / 25mm² cable — make sure your cable and crimp tooling match. Always verify current ratings, material thickness, and clearances against your own electrical requirements before building. High-current DC distribution deserves a careful eye. Big thanks to Elliot for letting me put this out there. Shared free — enjoy, build something tidy, and tag him if you do.
Print settings
- Layer height
- 0.2 mm
- Infill
- 40%
- Nozzle
- 0.4 mm
Assembly
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