After some long months of testing and developing the transmission tune for the 6HP26 in the 4.2L Jaguar XKR, we were pleased to bring the 1/4 mile down from 12.5 to 12.1, on regular PS4S street tyres, there’s an 11.9 in it with drag radials.
Still the quickest 4.2L XKR down the 1/4 mile in the world, by a long way
Read about our transmission tunes HERE
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