Fusion start at £150 for emb... Its not only for power increase though, it's for reliability, makes your engine more safer, and its more than likely to last longer. You say it's too expensive but it's gotta be cheaper than you spent on your wheels/cage/etc, it's come down in price a lot too, and it's going to show more difference than most of them bits, and you'll save a small amount on fuel, less chance of cracking manifolds, blowing/melting engines etc etc It's expensive but it's not a con! don't take that the wrong way I'm not having a pop. It's well worth it, but better off running safe boost until you have a engine your happy to keep at that spec for a while.