You can take a hole saw and drill out the plugs on each end of the muffler. If you look at the muffler from the end( ie, inside) you will see a flat, this is what needs to be drilled out. Each end of the muffler. It is a one inch or inch and a quarter. Once they are drilled out you will be able to see through the muffler.
I sent out some take offs to a guy I found on ebay, he is in Michigan, I think he charged me $150 to do it, they sounded great, and you could see through them. He puts in a 2" ID baffle. If you are interested, PM me and I'll see if I can dig up his email.
I know a guy on e-bay were I got mine, this set was 140.00 but he will mod yours to a 1,2or3 2 being the same as SE but a deeper tone for 85.00 plus shipping.
Check out fullsac.com, as they modify stock mufflers. Quick turnaround, quality work and good prices. Call and talk to Steve and he will explain the process to you.