T-Bolt Band Clamps 3-3/4in to 4-1/4in

The T-Bolt Band Clamps 3-3/4in to 4-1/4in by ALLSTAR PERFORMANCE are precision hose clamps engineered for serious engine builders and mechanics who demand reliability in high-performance cooling and fuel system applications. These clamps represent a fundamental step up from worm-gear alternatives, offering superior holding power and consistent pressure distribution across a wider clamping band. Whether you're assembling a street engine, race platform, or restoration project, T-bolt clamps eliminate the risk of hose slippage that can compromise coolant flow, fuel delivery, or custom radiator fitment.

T-bolt design leverages two opposing bolts that tighten concentrically around the band, creating uniform clamping force without the uneven pressure points characteristic of single-screw worm clamps. This geometry is especially critical when working with reinforced hoses, tight engine bays, or applications requiring repeated assembly and disassembly—the clamp maintains its sealing integrity cycle after cycle. The 3-3/4in to 4-1/4in sizing accommodates the most common hose diameters found in small-block and mid-size engine builds, including radiator inlet/outlet lines, heater hose connections, and bypass fittings. Constructed from durable steel with corrosion-resistant plating, these clamps resist vibration loosening and maintain structural integrity under thermal cycling.

Mechanics and engine builders working on LS swaps, carbureted restorations, or turbocharged platforms will find these clamps indispensable for securing factory-style hose connections or custom silicone radiator lines. The compact 6.05 x 1.9 x 6.65 inch footprint fits tight engine compartment layouts without interfering with nearby components. Installation requires only a wrench or socket set—no specialty tools needed—making them ideal for both professional shops and home garage builds. Stock these ALLSTAR clamps as part of your cooling system refresh, fuel system upgrade, or engine assembly kit.