I posted the size on the last page.
"So I bought the 30x8x5 single 3in/out magnaflow
I'll never buy another muffler except the big case magnaflows.
I had the 30x11x5 single 3in/out magnaflow on my old H/C 5.3 with LT's and it sounded awesome. Quiet at cruise and opens up at WOT."
Hope that helps