I have the Magnaflow streets
All you need to do is jack up the side you are doing first then just pull the stock muffler off. Then put the Magnaflow on.
I used dawn dish washing soap on the hanger rods and that allowed the rods to slip off very easy.
The hardest part on my 2012 was cutting off the small weld tabs that are on the flange when removing the stock mufflers. Some people use a drimil tool. My Brother had a small grinder but I have read on this forum you can knock the tach weld off with a hammer. ( I don't know about this method )
The Magnaflows fit perfect right out of the box. They sound great and look perfect. I really like mine.
2012-candy red- V-6 MCA, Automatic Trans. CFM Valve cover breather. MMD blackTail light trim.Magnaflow axle back street mufflers, JLT oil catch can.MMD hood struts.
Airaid Cold Air intake. red caliper covers, 3.7L performance engine cover, Flat black hood spears.Boss 302 strut brace, CDC rear panel, Trunk Cargo net,--Dash carpet cover,
Viser stickers to cover ugly yellow warning crap,Aluminum driveshafft and Swarr Bar.