Slow? Sluggish? Expensive to run? Tunit is the solution with up to 30% increased BHP and Torque up to 15% better MPG and an engine warranty included Tunit is the must have for motorhomes and towing vehicles.  From personal experience having a Tunit fitted to our own Citroen Relay, it really does deliver.  An engine remap or chip can be invasive to the engine management system removing the original software meaing a reversal or change can be diffficult.  Tunit is adjustable, removable and does not interfere with your original equipment, leaving the engine safety parameters in place.  From £450 Fitted there is no better option