[TR] exhaust

[nafzigerg at yahoo.com (Gary Nafziger)]

I'm putting together my own exhaust system and have a question about hangers.  
Is it essential to have rubber as part of a hanger between the exhaust and the 
frame or can the exhaust be connected to the frame with all metal?  I'm 
wondering about vibration and whether that weakens an all metal hanger, leading 
to breakage over time.  

just wondering
thanks

gary n.