Exhaust and Intake time/cost?

[sb01box]

I believe my primary cat is starting to rattle and is in need of replacement. 132k miles of SoCal driving. What's the odds that I will break exhaust flange bolt(s)?
Any tricks to removing them? along with penetrating oil, hot engine?, chill spray? impact hammer?
thanks in advance
Tad

[BYprodriver]

Originally Posted by sb01box

I believe my primary cat is starting to rattle and is in need of replacement. 132k miles of SoCal driving. What's the odds that I will break exhaust flange bolt(s)?
Any tricks to removing them? along with penetrating oil, hot engine?, chill spray? impact hammer?
thanks in advance
Tad

My SoCA 2000 Box has 102K miles, the exhaust has been in & out several times & it still has all the original bolts & converters.