Still a good price dude.
I cant tell you enough how good the fit is,
After a remap spending the £500 will justify spending that much on it.
Alternatively you could spend £100 on a good core then take the car to a good exhuast place I was going to take mine to
http://www.pro-speedexhausts.com/ and Charlie (the boss) said he could do me a good custom intercooler pipe setup for £200 fitted.
Thats £300 and you could have it the way you want it as its custom.