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.

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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.

REVIEWS

Ronnie ,Audi A4 3.0 V6 TDi

Hello Dan, Thanks for your reply,got your instructions in the box actually,dad never mentioned they were in there, therefore managed it no problem,installed in 10 mins- no battery power this time,so saved a job. Done a test drive and was amazing difference,infact i had to brake that hard from around 100 mph,my bl**dy pad wear light is now on! Your costing me a fortune Dan! So on that note.. ive whacked it up to number seven,s*d the expense.

Niel ,Audi A3 TDI

From knowing little about diesel tuning I knew my car was more capable, a friend recommended tunit. One phone call convinced me it is a quality product, I collected my box the same afternoon were I was taken through the product install and even shown were to locate the box on my car. The service was fantastic and even before fitting the tunit box I left with a smile and now an even bigger one with the difference it has made to my car!! thanks