Seems to be a load on the market but are some brands better than others . Need it to make a 2006 euro 3 Volvo Fm13 (400 hp ) to euro 4 . Thinking of cleaning costs and back up as well as initial outlay. Need someone to recommend a company if poss. London/Kent/Essex etc
Thanks
Golden Boy Coaches at Hoddesdon seemed to know there stuff, as does Wayne whose details are on another thread on here a few lines down, He’s based in Oxford. Baumot UK @ Milton Keynes will give you a list of there agents & are fairly helpfull too.
My mate Alex had his fitted at Maidstone Comms 5k, He says its just a bit flatter than before, He runs a 460 but is nailed to the floor most days.
I think if you’ve a standard exhaust box there 4.5k & I’m told are self maintaining 
with plenty of motorway work thrown in.