I was looking at an OEM Chevy with a butterfly. Didn't want to pay $$$. I found this one and read the reviews, most said it wasn't suitable for my application. I have a 2018 Chevrolet Tahoe LT. It fits perfectly! Anyone who is fed up with this product does not fit, it FITS! My exhaust was 2.71 inches in diameter. That's 2 3/4 inches. Ideal! Thank you Dinomax!