I bought them. I tried installing them today but it didnt go very well, couldnt get the bolts off the cats or manifold no matter what I tried. am going to buy an impact wrench tommorow. It was asked if it is a DIY job, well depends if you want to take alot of things off you truck. Took me 5 hours to get to where I could even get to begin to take off the manifold and cats. You have to put your truck on jack stands take off the front tires, remove the rubber mat and get in the engine compartment through the wheel wells. have to remove heat shields to get to all the cat nuts and manifold nuts, out of all the nuts I broke 1 loose by hand and my truck was made in Aug., but hopefully an impact wrench will fix that.

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