Been looking at getting my Renault Trafic remapped & came across these chip/remap boxes that connect up under the bonnet, has anyone had any experience with these as I've never seen nor heard of them before!

Looked through the feedback of some of the companies selling them & they was very positive, says it will take my 115bhp van to 143bhp!

Always worth doing abit of research when it comes to things like this.

J.