The Tunit Optimum Plus is easy to fit to any petrol vehicle by simply plugging in to the OBD port. The Optimum Plus uniquely can be adjusted from your phone Eco to Sport Plus. Transfer free to any nu

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Superior Performance

Performance is our passion and we work to get more out of your engine. Optimise your petrol engine today for more power, torque and fuel economy.

Adjustable Tuning

The Tunit Optimum Plus is easy to fit to any petrol vehicle by simply plugging in to the OBD port. The Optimum Plus uniquely can be adjusted from your phone Eco to Sport Plus. Transfer free to any nu

Go Eco

Easily switch between Eco, Sport and Sport Plus from your phone. The Optimum Plus provides a unique ability to fine tune to your needs.

REVIEWS

John ,Honda C-RV 2.2 i-CTDi

Hi Dan. Just to let you know how I am getting on with my Tunit. Fuel consumption has increased on local runs by 5mpg but best of all towing performance is super have changed to a larger caravan since fitting the unit its much quicker off the mark and it flys up the hills can keep in 6gear much longer and is smother. Had to remove the unit when the crv went in for service really do notice the loss of power and acceleration without it. Will keep you updated when I do so long distance touring with the van this year. John Pope

Bruce,Vauxhall/Opel Meriva 1.3 CDTi

Hi Jerome, I purchased a V-CR unit for my Opel Meriva 1.3CDTI direct from you in early April, I have now had the chance to run it for a month and over 1000 miles. In a word "Superb". The little JTD engine has always been flexible and willing but a little down on power, especially on hills. This has now all changed, there is a lot more power at lower revs, the acceleration is better and it's quieter. I have not had a chance to accurately check the consumption but it looks as though I am using less diesel than before.

So a very happy customer.

Kind Regards