I have gutter guard on my stock grill and bumper(not in sig) and it is some pretty weak stuff, just wanted to let you know. Its fine to hold up to the wind, but easily deforms with little force like when you try to install it. If you want something stronger, maybe you should go another route other than gutter guard. If you want to check it out, just ask for gutter guard at home depot and they will know. BTW, its diamond shaped.