Just wish I had had this done 6 months ago.Whole job took less than 3 hours and the results are brilliant. Not only has the average MPG increased by about 10%[ I actually got 63mpg in the slow traffic immeditely after the work was carried out],but when called on to do so the car ‘flies’…but when it,s ‘flying’ the mpg does drop like a stone…but of course it would have done that before anyway. And the added bonus?…That annoying little DPF warning light has been extinguished hopefully never to be seen again. Thanks for a job well done.