[Cocacolakidd]

Bah-humbug to all those who have said that you cannot add or change a Brake Bias Valve to a 944na. It screws right in place on the driver's side front port - the port for the rear brake lines. What you do have to do is to procure a brake bias line for that area from a 86-89 turbo so it will allow the extra room there to add the bias valve (The bias valve sticks out approx. 2 1/2" from MC, and the OEM line will not fit correctly). I have added the 5|17 and the 5|33 bias valves to several NA's in the past, and that was on both the Girling and Ate MC's - all turbo and 928 bias valves will interchange size wise - just do not use the wrong a bias valve so that you loose effective rear braking.