muffler question
 

hello everyone. i am building a muffler and am wondering do the bolts that hold my muffler to the engine have to be protected from the gases and heat or can they be exposed to all of this

thanks

brad burling

RE: muffler question
 

yes, they can be exposed, the only reason most mufflers have internal tubes is because they support the structure of the muffler so it doesn't collapse...