Pre-Set To Either Sports +, Sport, Std Or ECO

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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 is easy to fit to any petrol vehicle by simply plugging in to the OBD port. The standard Optimum comes pre-set in one of three performance settings from Eco to Sport Plus.

Go Eco

By using Eco mode on your Tunit Optimum you can make drastic improvements to your fuel economy and save money by filling up less often.


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

Joe ,Toyota Hilux

The Hilux is used to tow machinery and tools to and from jobs every day. These can be up to 30 miles away. A trailer is being towed nearly all the time with either a tonne or so of topsoil or hardcore or a mini-digger in. This is why the large torque gains where so beneficial to me and the company. This extra torque meant that the fully laden trailer could be pulled at far lower revs resulting in huge gains in fuel economy. The extra power when the trailer is taken off from the tunit still impresses me everytime.