I just put in the blitz one on the weekend. Extremely happy with it!
Required a small amount cutting of cutting of the front brace thing, (not sure what you call it, bit of metal that sits in front of the thermo fan, between the lights). But this amount of cutting to less than 5 mins with the cordless angle grinder...
Out of my stock bumper i cut the whole black middle plastic part out + a tiny bit more of the white plastic. also had to cut alot out of the right air intake piece (infront of old side mount).
The piping was a perfect fit and the mounting required NO bashing at all! used 2 small washers to mount it a couple of mm forward to clear the thermo fan motor.
I'll get a pic up for ya when i get a chance