I RAN 2" IN AND 2" OUT ON MY 52 CHRYSLER AND USED PORTER STEEL PACK MUFFLERS. I HAVE USED THESE FOR YEARS AND I FEEL THEY ARE THE BEST SOUNDING MUFFLERS ON SIX BANGERS OR V-8`S.BABLER MUFFLER SHOP IN MOUND MINNESOTA MAKES THEM---YOU WON`T BE SORRY. 612-472-2522. GOOD LUCK.......52ER

One should live as if you sold the family parrot to the town gossip....Will Rogers