I've dealt with this company for over 8 x years , bought a synergy tuning box for my freelander 1 TD4 and recently another one for my Discovey 3 TDV6 , both times it has transformed my engine , reducing flat spots , improving Mpg First synergy tuning box was fitted for 7 x years , never let me down , are well built . Any questions have just been a phone call or email away , Ron is a true gent in going that extra mile for customer service and also his technical knowledge is very impressive Cant recommend Ron and his products highly enough , is refreshing to find a company who cares about there customers gary

Thank you delivered quickly

Fast delivery; good product; Thanks!

Have both Synergy 1 and digibooster which have transformed my mundane Modus 1.5dci into a much more pleasant and drivable vehicle. This combination is streets ahead of competitor products I used in the past. Quality performance price service and reliability have been exemplary over past year since installation. Thoroughly recommended

Not fitted it yet but great service and delivery

Unbelievable difference, so much nicer to drive, even the auto gearbox us working better now that there is a broader spread of power. If you have a Rover 75 diesel, don't hesitate, its what your car is crying out for. Can't fault this company, very helpful advice and prompt dispatch, can't ask for more.

More power, very good for td5 auto

Great advise from a knowledgeable company, I was so impressed with the results after fitting synergy 2 to my Rover 75 tourer.

Excellent products and price

I've used there product for a number of years, on my mg's an now my 2.2 smax, always very helpful an will continue to use there products in the future

Bought the tuning box for my 850 tdi. Performance greatly improved from low revs. Turbo spools earlier, giving better acceleration.

Good product at a fraction of what others are charging

Great service, Great product! Delighted with the result of the ronbox, highly recommend to anyone tuning diesels.

Excellent service as always. Quick delivery.