Squirrelly 3" Stainless Steel T-Bolt Clamp for 3.0 inch Silicone Turbo Intercooler (2 Pack) Tired of your intercooler piping blowing off? Upgrade to these Heavy Duty Stainless Steel T-bolt Clamps and leave those old worm clamps in the dust. Our T Bolt clamps are made from heavy duty 304 stainless steel with rounded band edges to protect soft hose materials from cuts. These high quality T-Bolt Band Clamps provide high tensile strength, durability, and are corrosion resistance. 3inch outside diameter. T-Bolt clamp measurement: Largest 87mm / Smallest 79mm. 3.42inch // 3.11inch.