10X 3"Stainless Steel T-BOLT CLAMPS Turbo Piping Hose

I ordered these to fit a 2.75" pipe (which is 3" O.D. with silicone coupler). I had to ratchet the clamp all the way down until it bottomed out before it would clamp the tubing. It technically held fine, but looked horrible! There's 2" of bolt sticking up. These couplers are 3.25" when expanded, 3" when contracted all the way. I will try to upload a picture to demonstrate (polished tubing with red silicone coupler).My buddy (a USAF mechanic) took one look at it and told me they are the wrong connector. He does a lot of turbo diesel and industrial air conditioning units and uses a lot of T-bold connectors - in his words "I would get written up if I submitted that work and called it finished." These do NOT fit 3" O.D. They MIGHT fit 3" I.D. tubing (3.25" O.D. w/ coupler)I had to pay $9 to ship these back, however they did at least refund my initial purchase. Their next size smaller will not fit 2.75" (3" O.D.) Will be shopping elsewhere and I'm out 9 bucks and a week and a half behind on my EFI install.Be very aware when buying clamps on I.D. (inner diameter) measurement versus O.D. (outer diameter) measurement - and sometimes even the sellers (or at least their product listings) are unaware of the actual fit!