Tubing .250 x .035 Moly Round

The Tubing .250 x .035 Moly Round from ALLSTAR PERFORMANCE is a precision seamless steel tube engineered for custom exhaust systems, fuel line fabrication, and structural applications in high-performance automotive builds. Whether you're constructing a full custom exhaust manifold, building roll cage components, or routing fuel and coolant lines on a race engine, this molybdenum-steel tubing offers superior strength-to-weight characteristics compared to mild steel alternatives. Mechanics and fabricators trust this product for applications where reliability under extreme temperatures and vibration cycles is non-negotiable.

Moly tubing (molybdenum-alloy steel) delivers significantly higher tensile strength and creep resistance than standard DOM tubing, making it ideal for exhaust headers, intake manifolds, and pressure-bearing systems exposed to sustained heat above 400°F. The .250-inch outside diameter with .035-inch wall thickness provides an excellent balance of structural rigidity and workability—thin enough for tight bends and complex geometries, yet robust enough to handle thermal cycling and mechanical stress without necking or failure. This 144-inch length (12-foot coil) minimizes waste and reduces the need for multiple purchases on mid-sized projects, and the 1.5-pound weight makes handling and positioning easy during fabrication.

Experienced engine builders, exhaust fabricators, and race car mechanics rely on ALLSTAR PERFORMANCE moly tubing for LS engine swaps, turbo manifold construction, and custom fuel systems where standard steel tubing would fail prematurely. It machines cleanly, TIG-welds readily with appropriate rod and shielding gas, and accepts bending without kinking if proper mandrel techniques are employed. For any project requiring longevity in high-heat or high-vibration environments—from street muscle cars to competition vehicles—this seamless moly round tubing delivers the durability and performance margin serious fabricators demand.