To see how much fun our Tesla Model 3 could deliver, we took it to an ice autocross held on Ross Lake in rural northern Michigan. One problem: Unlike the Model 3 Performance, the stability control can’t be disabled on lesser Model 3s, making for zero fun on slippery surfaces. Cue the aftermarket.

Mountain Pass Performance, which sells all manner of go-fast bits for Teslas, developed an add-on electronic module it calls a Party Box ($920) to fool the Model 3 into impressive tail-out buffoonery.
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