just a hint : use the correct clamps(Pelican) and use an effective tool to secure/tighten them.If the clamps slip off while driving and you don't notice the grease on the exhaust/the mess ......
Oetiker ear clamps
http://www.amazon.com/Oetiker-14100083-Side-Jaw-formerly-Plastic-Coated/dp/B0037QFNJM