It's a launch control kit that has 1 sensor for wheel speed?
That doesn't make sense to me.
You'd need a minimum of two sensors, surely? One for a driven wheel and one undriven (as a reference). Ideally three, one per front wheel and an undriven rear, but this would be pointless as there's no ABS function to grab the brake on the wheel that's rotating faster. I guess it just cuts ignition or something?
I read someone fitted ity years ago and loved it, never understood the need myself, just practice clutch control!