Optimum Plus - Petrol tuning solution
Optimum Plus front
Optimum Plus back

Optimum Plus

Petrol Tuning

Power Gains

Better Fuel Economy

> Increased BHP

> Increased torque

> Fuel savings on average 5%

> Adjustable via App

> Increased BHP

> Increased torque

> Fuel savings on average 5%

> Adjustable via app

> Reprogram to next car for free

> Easy to install

> Engine & product warranty

> Lifetime part exchange

> Reprogram to next car for free

> Easy to install

> Engine & product warranty

> Lifetime part exchange

Petrol tuning with the Optimum Plus

The Tunit Optimum Plus is the premium product for Petrol engine vehicle. The Optimum is easily installed or can be installed by one of our dealers through our worldwide network. It is packed with the most features which will improve your BHP and torque while also decreasing your fuel consumption.

The Optimum Plus has can be moved between ECO, Sport and Sport modes using our mobile phone APP. Uniquely the Optimum Plus can be transferred to any other vehicle at no extra cost to you.

Annual Mileage

15K miles
1,000 miles100,000 miles


35 mpg
1 mpg70 mpg

Fuel Price

190 p/l
100 p/l200 p/l

Annual Fuel Cost


Annual Fuel Cost w/ Tunit


Annual Saving


Pays for itself in 14 months



Fuel Saving


Tunit is extremely proud to boast a very strong and long-standing dealer network which helps us cover the majority of the UK and even overseas. We believe local installation and support is as important now as it has ever been. The feeling of confidence knowing that the Tunit has been fitted professionally matters, and by using one of our dealers you can walk away knowing you’ve got a high quality tune.

One thing that is always on a customers mind when it comes to tuning their vehicle is the effect that it’s going to have on the vehicles lifespan. At Tunit we operate within manufacturers saftey limits which means that the Tunit isn’t capable of causing any harm to the vehicle. We recognise that people are always scepticle of taking a company at their word and that’s why we cover your vehicle and product through warranty.

The Optimum Plus comes with a 2 year product warranty to ensure that your purchase is covered. Alongside the product warranty we offer a 2 year engine and drivetrain warranty which covers your vehicle from any potential caused by the Tunit. This however is purely in place for your peace of mind as we have never had a claim to say that the Tunit has caused damage to a customers vehicle.

With the current price of fuel soaring and a lot of uncertainty around whether we will ever see some of the prices we’ve become used to, it’s more important than ever to be mindful of the amount of fuel we’re using. The Optimum Plus aims to reduce the amount of fuel your vehicle is using by helping you get in to higher gears faster and stay in them for longer. 

Our customers average a 5% saving on fuel after having the Tunit fitted and even just saving a little bit can make a big difference over the course of a year or two.​

The Optimum Plus provides easy installation and quick adjustment by connected to your smartphone via our app. This way you can easily change the mode of your Tunit on the fly to suite your drive and maximise the efficiency of every journey you make.

This level of adjustability is unique to our product and not something that can be easily mirrored via a remap. The ability to change your tune when you want helps you to get the most out of your Tunit and optimise how your want the car to feel depending on the journeys you’re making.​


P. Hunt

BMW 330d

I called in last week and decided to go-ahead with yourselves fitting the unit to my BMW 330D. After a short while (approx 30 mins), my car was fitted with the unit and ready to go. I could not believe the instant response as soon as I accelerated, as, with most diesels, the turbo lag was obvious before fitting of the tunit...to my amazement, this turbo-lag has been completely eliminated, giving my car instant acceleration. This was my main objective with this already powerful car, and after driving back home, I was totally convinced of the improvement both in economy and power. It feels as though I have had a completely new more powerful engine fitted, as the power range through the gearbox (auto) is smoother and about 30-40% quicker!!! To make matters even more immpressive, I have noticed approx. 12 mpg gain. This is a true reading on my on-board-computer, and I have now worked out that it will take me about 6-7 months of driving to "get-my-money-back" on this faultless unit! What more can I say. Absolutely thrilled with the product and I would recommend it to everyone

Review received via Email

Andy Stubbs

Nissan Navara NP 300 2.3L

The guys at Tunit could not be more helpful. Got my mate Dave Bardwell to do the instillation as he is a mechanic and I am not. He got on the phone and the Tunit staff sent through pictures and detailed description. Got the Advantage 3 and Power Pedal Pro fitted. Straight away there is a very noticeable sharpening of throttle response and generally more grunt. Only driven it for about 8 miles so far so cant comment on the fuel economy just yet. Well pleased. Can highly recommend Tunit, Andy Stubbs.

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