You sure they have been replaced? M1144's are more expencive than Xtreme's. I think they are carrying on the M1144 from what I have heard.
Hopefully I will have my M1144's on soon so will see the difference.
I thought xtreme were a different type altogether too.
They do 1144, 1155, 1166, 1177 and 1188 compounds still I'm sure.
Am I right in thinking performance pads tend to squeek/squeal? I always notice this on cars geared up for tracks or heavily modified brake systems?
Pads designed for high temperature use have a higher metal (copper?) content in them so obviously are going to squeel more than standard jobbies. My full race wilwood pads squeel like hell and when the wheels are covered in brake dust you can see loads of little metallic bits in the dust.

I think it was just my pad/disc combo which makes them squeal. Both of my cars I had (before the new one) ran Bembo Max discs and extreme pads... both had identical problem with the squealing. I must say, it was only with light braking. When braking firmly they were awesome. So I think perhaps the compound just didn't agree or something. 
