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Excellent service as usual. Have had my tuning box reprogrammed/ recabled twice now from an xtrail to a berlingo to a caddy and has given expected gains every time. First bought a (Ronbox) years ago for a rover 75. Unreal difference to the car. Hope to be a customer for many years to come

One of the best and most versatile add ons for the Range Rover P38 with the BMW engine. Its transformed my RR from a docile slug to a vehicle that is much more responsive, a pleasure now to drive. Fuel economy in mine increased by almost 30%, top speed by an extra 17 mph and hill climbing is no longer a chore. I strongly recommend the RonBox as a definite must have without a doubt.!!!

Amazing product, easily fitted and great value for money. If you have a 300tdi you need one of these.

Fitted a synergy 1 tuning box to my Mercedes sprinter motorhome, been for its first run out today and wow very very impressive. Even the sprint shift gearbox changes smoother and quicker with much less throttle, turbo kicking in now about 1800rpm rather than the 3000rpm that it was doing. Fantastic product and communication, and next day delivery was an added bonus. Thanks Ron and well done on a terrific product.

Dear Ron, thank you very much for your great product. Digibooster works very well and I thank you again for your service.

great bit of kit

I was only getting 24mpg with my P38 2.5 DHSE but now using the factory settings l can achieve 32+mpg

The rover CDTI wasn't that bad but being a bit long in the tooth it was starting to feel a bit tired. Just had a new Bosch MFF fitted so it didn't need one, I put in the Ronbox on Saturday morning and went for a try out drive. Super... only on 3 so far but feels like a new car again, not only really nippy but much smoother from low down. Love it. Thanks Ron.

Fantastic product & service, communication was great!!

Great seller. Very helpful with quick replies. I purchased a Synergy 1 box and it made a huge different in torque.

Very good service delivery the next day.. and if you run into any problems then you get help straight away. Very pleased with purchase aswell

Great Service, Knows he stuff, would buy from again, made a huge different on previous car, new one, Im still letting it settle in. Good honest pricing

Great product, great service.

By God you saved my landy. This kit is awesome. Do not underestimate!!

They were very responsive to all my questions and very helpful too. Would recommend!

Great instructions, quick answer of email. Goes good.

Very quick delivery Well packaged Value for money I love it Video on my Youtube channel , Steve wildman

Excellent product , delivered before due date. We Easy to fit and works very well

I have had two separate 'Ron boxes' and both have shown a great improvement in drivability and power. Much cheaper than all the rest and better than most. We'll done Ron.

I've bought a Ron's "SYNERGY 4B (VP) FOR THE RANGE ROVER 2 P38 2.5L 6CYL" some months ago. I've installed (setting 2 with fueling half way) on my 220.000 Kms 1999 Range Rover P38 2.5 DSE with automatic transmission and now, after having run some thousands kilometers I can write my opinion : Simply I have a new car, it's unbeliavable and fantastic ! I can run with the cruise control at 50 mph without hearing the gearbox switching between the 3th an 4th speed continuosly at each small hill, now the engine have enough power to keep the 4th speed quite everywhere. I can overtake a car on the motorway with the 4th speed. The p38 is a heavy car and don't believe that with some power more you can obtain a nervous car, but with this Ron's tuning box driving my Range Rover is a real pleasure. The P38 calculated fuel consumtion is really lower, the real fuel consumtion calculated is 1 liter less for 100/kms, I'm now at 10,2 l/100 Kms and without the Ron's box I was at 11,2 l/100 kms in the same conditions. Thank's Ron for your help to improve my Range Rover qualities.