i believe it was 2 of these
http://www.amazon.com/Thrush-17702-Turbo-Muffler/dp/B00029WXMM/ref=sr_1_1?s=automotive&ie=UTF8&qid=1438560368&sr=1-1&keywords=thrush+turbo+17702
the muffler body length is 11 inches which was short enough to squeeze 2 in.....it really sounded awesome...ran it for about 2 years on my 01