If you’re vehicle has the OEM front and rear cats reuse original hardware such as bolts and nuts with the Motordyne Art Y Pipe, but if you have the Magnaflow front and rear cats like I have use everything I have/show. Regardless installation is the same just different hardware.
Subscribe to his channel for some incredibly useful and informative videos, especially if you own a 2009-2014 7th generation Nissan Maxima. His content is quite unique and valuable for the 7thgen!