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. Please set your quantity to the amount of feet you would like to purchase.
Now sold by the inch. when more than 12 inches are purchased
12 inch. minimum purchase required
**Specific Shipping info - UPS max length 6ft. USPS international shipping limits max length to 42 inches. If ordering large quantities, please specify saw cut lengths that will stay under the max length.
RMR reserves the right to charge for multiple saw cuts at $1.00 per cut. 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.