Tubing & Bends

Mandrel bends, straight tube, bellows and flex sections, weld wire, O-rings and fabrication stock — Vibrant Performance, Derale and more.

This is raw material rather than a finished part, so it is bought to dimensions. Tube is specified by outside diameter, wall thickness and material — mild steel welds easily and rusts, aluminized resists corrosion at low cost, and 304 stainless survives salted roads at a higher price and a fussier weld. Mandrel bends keep the full diameter through the curve where a crush bend pinches it, which is why they cost more and flow better.

Order the bend radius as well as the angle. A tight-radius 90° and a long-radius 90° occupy very different space under a vehicle, and the one that fits the route is the one worth having. Bellows and flex sections absorb engine movement and belong between the manifold and the rest of the system, not further downstream.