GrimmSpeed has provided you with new J-Pipe hardware. Every time you remove or replace your J-Pipe, you should use new hardware upon re-assembly to save time, and avoid the hassle of tryting to wrestle with haggard hardware. Especially if its hardware used in exhaust components that can become stubborn over time due to extreme heat cycles.
GrimmSpeed has saved you the inconvenience by providing you with all brand new hardware.