HD Union Sleeve 3.5in OD Tubing

The HD Union Sleeve 3.5in OD Tubing by VIBRANT PERFORMANCE is a precision-engineered component designed for serious custom exhaust, intake, and fluid management systems. Built for mechanics and enthusiasts who demand reliability in high-performance applications, this union sleeve serves as a critical connector in modular tubing assemblies where vibration isolation, precise alignment, and repeatable fitment are non-negotiable. Whether you're fabricating a turbo charge piping system, custom coolant lines, or exhaust tube sections, this component ensures leak-free, durable connections under thermal and mechanical stress.

Featuring a 3.5-inch outer diameter, the HD Union Sleeve accommodates standard 3.5in OD tubing with precision-fit internal geometry that prevents slippage and promotes even clamping load distribution. VIBRANT PERFORMANCE's heavy-duty construction ensures the sleeve maintains structural integrity under pressure cycling, thermal expansion, and vibration loads common in motorsport and street-modified applications. The compact design—measuring 5.45 x 2.2 x 5.95 inches—allows installation in tight engine bays while maintaining full functionality. At just 0.07 lbs, the minimal weight penalty makes this an ideal choice for builders focused on both performance and weight management.

Professional fabricators and weekend warriors alike benefit from this sleeve's compatibility with 3.5in diameter tubing stock commonly used in aftermarket intake manifolds, intercooler piping, and custom exhaust systems. Installation requires standard hose clamps or band clamps rated for the application's pressure and temperature range; proper torque sequencing and clamp positioning are essential for optimal sealing performance. This component pairs seamlessly with other VIBRANT PERFORMANCE tubing, adapters, and union fittings, making it a versatile building block for modular system design. For anyone building a bespoke performance system or repairing a worn connection in an existing setup, the HD Union Sleeve 3.5in OD Tubing delivers OEM-grade reliability at an accessible price point.