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Is there a tuner similar to the SCT Livewire for Jaguars that will let you reprogram the ECU through the ODBII port? I have one of these for my Mustang and can easily switch between performance tunes and economy mode depending on what I'm up to at the moment and was hoping to be able to do the...

Hello everyone. I'm in the US and have two Jaguars, a 1996 XJ6 (X300) and a 1999 Vanden Plas (X308) as well as a 4L V6 Mustang convertible. The Mustang is easy to get performance information on, but the Jags, at least on this side of the pond, are things of mystery, so I was hoping I'd be able...