Just wondering how big the center is on the glass pack slip in mufflers. I know the tube they slide into is 4in but I am wonder about the glass pack it self, not the reverse flow type. I am guessing its eithe 3in or 2-1/2in inside diameter. i would be really interested in a picture of the center if anyone has one. Thanks.

 

I had mine off yesterday,& was going to pull baffle(couldn't get it out).The perferated center pipe of the baffle looked to be about 2",looked pretty small. Sometime this week I'm going to get the baffles out & measure..........Bob

 

I think it's about 1 5/8", and LESS between the louvers..............