SEMA 2025: THUNK’s Model 3 tunnel drive redefines EV conversion fitment
Key takeaways
- THUNK’s Model 3-based in-tunnel drive offers a compact, lower-cost EV conversion option for commercial and specialty vehicle applications.
- In-tunnel drive layouts free up space for high-voltage batteries, improving weight balance and range potential for electric fleet conversions.
- SEMA 2025 highlights growing interest in practical EV retrofits as fleets explore ways to reduce emissions and electrify.
THUNK drew attention at SEMA 2025 with the debut of its “THUNK3” in-tunnel drive unit, a compact 300-hp Tesla Model 3/Y motor and 3:1 planetary gearbox designed for smooth integration into ICE-to-EV conversions. The unit frees up engine bay space for high-voltage batteries and offers a more affordable alternative to other tunnel drives, highlighting growing aftermarket demand for practical EV swap solutions.
Toyota and GM also made noise on the show floor, with Toyota unveiling its high-powered Corolla EV and bZ Time Attack concepts, while GM was challenged to bring similar performance ambition to future EV models. Together, the automakers’ showings underscored how EV conversions and factory-built electrics alike are pushing the boundaries of performance, affordability, and design across the automotive landscape.
You can read the full article—SEMA Debut: THUNK’s Model 3 Traction Drive Fits in Trans Tunnels by Andy Turudic—on Electronic Design.
