I have one on my fully forged v had it for a few years now and its still as good as ever, sadly it is restricting power when you are pushing 300hp or there abouts, its not raspy on the glanza more a deep rumble untill you get on boost, but not raspy, mines will be for sale within the next few weeks if you are interested, once i get the keys to my unit in 4 weeks or so itll be taken off and put up for sale.