help with piping

[silveradokinggg]

i have an 03 chevy 1500 z71.

im gettin pipes done in a week and im looking at 8inch glasspacks

i need help with my inlet size to the muffler.

i thought it was 2.25 inchs, but not sure.

can someone tell me if this is correct or help me?

[CowboyUp]

2.5in

[SierraDan]

Stock you should have 2.75" single exhaust, so you can run 2.5" or 3" inlet, either way a shop can make it fit. If you're talking about duals then that's all custom stuff so you ought to know what you want.