We also sell our Half Round Extrusion by the inch.
The Half Round Plenum Extrusion is extruded from 6063 aluminum. The Extrusion shown above has an internal diameter of 3.5" with an overall external size of 4.00" wide x 4.00" tall. The extrusion is perfect for either one off manifold buildups or for someone looking to produce and market their own Intake Manifold design. The Half round design is ideal for tight engine bays where clearance with the hood or firewall is an issue.
**Specific Shipping info**
USPS international shipping limits max length to 42 inches. If ordering large quantities, please call.
RMR also reserves the right to charge for extra shipping charges for large quantities of rail ordered through our online store given the shipping calculator doesn't always cover for the weight/length.