best way to get rusty exhaust manifold bolts out??

[67fastback]

hey question for ya,
What is the best way to get the rusty exhaust manifold bolts loose with out braking the studs???

[biggin69]

Heat and lots of Aerokrol

[underpowered]

Heat and PB blaster.

[67fastback]

well I got it to brake free...sprayed it with bp blaster for 3 days and tried to brake the bolts and they seem to brake free really easy.. so it worked well.. thanks all.. new header installed.. now..:thumbup: