Mileage Blocker for Dyno Testing — The Essential Tool for US Performance Shops
If you run a performance shop or regularly tune vehicles on a dynamometer, you already know the problem: every dyno pull adds miles to a customer’s odometer. A typical full tune session — including base runs, adjustment pulls, and validation — can add anywhere from 30 to 100+ odometer miles to a vehicle that hasn’t left your workshop.
That’s where a dyno mileage blocker becomes essential.
The Dyno Problem — Why Odometer Miles Accumulate
A dynamometer measures your vehicle’s power output by spinning the driven wheels against rollers. The vehicle’s ECU sees wheel rotation data and records it as mileage — just as it would on the road. The result is that every dyno pull, every calibration run, and every power check adds permanent odometer miles to the vehicle.
For a customer who brings in a low-mileage sports car or a brand-new truck for tuning, this can be a real concern — and for a shop, it can damage customer trust and repeat business.
The Solution — A CAN Bus Mileage Blocker
A CAN Bus mileage blocker intercepts the speed signal at the network level before it reaches any ECU — including the instrument cluster, transmission module, and all other control units. With the blocker active, the vehicle’s ECUs receive no movement data, and zero miles are recorded regardless of how many pulls you do on the dyno.
Which Vehicles Are Compatible?
We have vehicle-specific mileage blockers for virtually every car and truck you’ll encounter in a US performance shop, including:
- Ford F-150, F-250, F-350 (including Raptor and PowerBoost)
- Chevrolet Corvette, Camaro, Silverado
- Dodge Challenger, Charger, Ram TRX
- BMW M2, M3, M4, M5
- Mercedes AMG C63, E63, GT
- Porsche 911, Cayman, Macan, Cayenne
- Tesla Model 3, S, X, Y
- And 400+ more
Benefits for Performance Shops
- ✅ Zero odometer miles added during dyno sessions
- ✅ Happy customers — their mileage stays accurate
- ✅ Plug-and-play — your technicians can install it in minutes
- ✅ Completely undetectable — no diagnostic flags
- ✅ Works on gas, diesel, and electric vehicles
- ✅ 12-month warranty and full technical support
Add the Extended Reach Cable for Shop Use
For workshop environments where the same blocker is used repeatedly, our Extended Reach Cable Upgrade ($75) is ideal. Route the activation cable to an easy-access point and activate or deactivate instantly without any dashboard removal each time.