Quick question, gonna gut my cat but he dude told me I needed a glasspack, is that true or is he trying to sell stuff?

 

Just trying to sell something.

 

What was his reason other than you needed a glasspack....you might need it to stay under noise ordiances, or he believes that you will need the back pressure from a muffler(if your not running one).

Backpressure is a very debated subject and from what I have seen on a stock magnum motor you need some backpressure to keep from losing lowend, if you have no muffler or cat you will drop your backpressure puttin that glasspack will help keep you from losing lowend torque