Vibrant Aluminum Transition (3.5in x 4in Tube O.D. x 3in Overall Length)

If you're working on a custom exhaust or intake project, this Vibrant Performance aluminum transition tube is a handy piece to have. It lets you smoothly connect tubing that has different outside diameters, specifically going from a 3.5-inch tube to a 4-inch tube. This transition is 3 inches long and made from 6063 aluminum, which is great for fabrication work because it needs very little prep before TIG welding.

Using a piece like this is a clean way to join tubes, especially if you want to avoid using silicone couplers. The aluminum is mirror polished, giving your project a professional look. The wall thickness is 1.8mm, making it a solid choice for custom builds where you need a reliable connection between different tubing sizes.