It's probably sh*t. Tuning Boxes (rather than re-maps) work by falsifying the readings from usually one sensor. With these you are much more likely to have issues like limp mode, EML light on and clogged DPF.
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2011 XC90 D5 Executive
2003 C70 T5 GT
2012 Ford Ranger XL SC
1977 Triumph Spitfire 1500
1976 Massey Ferguson 135
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