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Superior Performance

The Advantage 3i provides superior performance economy specifically tailored to work exclusively on i-ART engines.

Adjustable Tuning

The Tunit Advantage 3i premium model provides easy adjustment via an external dial or bespoke fine tune through our national dealer network for maximum results.

Go Eco

Every driver and every car is different. Adjustment dial allows can be adjusted higher for mor power or lower to improve economy.


Jonathon,Audi A5

Just wanted to add the NEW Optimum PLUS with Smart Phone control is an amazing bit of kit, less than 24 hours into using the upgrade but its brilliant, thanks again Michael and everyone at Tunit.

Ronnie,Audi A6 2.0 TDI 140bhp

My car is going like a train!!!!!!!! I think i'm getting about 10 extra mpg,measured on a nice flat straight road.That alone is worth the money. (I'm trying to convince my dad and sister to get one now! Think mum is the main problem here!)