Cut out Placement.
https://ls1tech.com/forums/ls4-perfo...ut-cutout.html
I have a few scars on the bottom of the cutout from going over speed bumps too fast and bumpy roads. It fits good. It also should not matter for a shop to weld on stainless. Make sure you get the 3 inch cutout if you do have the magnaflow cat back instead of the stock 2.5 inch

