Install is not cheap because its a b%$#* of a job, noise is nice especially under WOT. Real world performance gains I dont believe are as good as all the vendors make them out to be but of course it all helps
Will VRSF DPs fit RHD cars? you need to be careful on anything thats not AR Design in my opinion. I had some iCarbon ones a while back and they didnt fit so the workshop needed to make some modifications to the pipes...$700 later in install costs. AR are more expensive but they have been proven to fit RHD cars so just check it out first.