Installing a used CS test pipe in the morning, need to know what hardware I'll need!!

Hey guys,
I'm installing my CS test pipe in the morning and have heard mixed stories about the install. I have heard that the stock hardware will work, and then I hear that only 2 of the four bolts will work with the stock hardware. I need to know what bolts I need to get to make this thing work. I seen one post that said m10 1.25 bolts will work, but curious what length if that's the case. Someone help, I want to install this in the morning.
 
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