Ive been keeping an eye on this topic and just want to comment to stick up for mountune.
Mountune offer a full stainless steel exhaust system, K&N with Cold air intake and a remap for £1370 fitted right now. I dont know of any other company who offer the same for less and so considering its a ford back upgrade I think thats extremely great value.
Now mountunes own downfall maybe that there were maybe too honest and chose a very stingy set of rollers at TOTD to test their kits.
On these rollers cars the pumaspeed 180 package made 163 bhp rising to 169 bhp with the 190 map.
Cars with flexi, K&N's etc with making mid 150's so if you think your going to get the same performance increase without a full exhaust then you need to think again.
The only cars to beat the mountune 165 were cars with cams etc and even those were only making 174 bhp, far from the 190 bhp that its claimed they should make.