5/16 Aluminum Scalloped Tube - 21.5in.

The 5/16 Aluminum Scalloped Tube - 21.5in. from QUICKCAR RACING PRODUCTS is a precision-engineered fuel line and hydraulic tubing component built for high-performance automotive applications. Designed for drag racing, circle track, and street rod enthusiasts, this scalloped aluminum tube reduces weight while maintaining structural integrity in demanding fuel delivery and brake systems. The 21.5-inch length accommodates mid-sized engine bays and custom frame layouts, making it an ideal choice for builders who demand reliability without sacrificing performance.

Machined from lightweight aluminum alloy, the 5/16-inch diameter provides optimal flow characteristics for fuel systems operating under pressure or gravity feed configurations. The scalloped profile—a signature QUICKCAR design—reduces mass by approximately 15–20% compared to standard tubing while the recessed fluting maintains crush resistance during installation and vibration cycles. At just 0.43 lbs, this tube contributes minimal weight to your fuel cell, carburetor, or hydraulic brake line runs, allowing budget-conscious builders to shave pounds without compromising durability or safety margins.

Mechanics and racers benefit most when routing fuel lines or brake tubing through tight engine compartments where standard rigid lines cannot flex or fit. The 21.5-inch length works well for small-block to big-block conversions, vintage street rods, and purpose-built race cars using carbureted or EFI fuel systems. Installation is straightforward—flare or crimp the ends using standard -4 AN or -6 AN fittings depending on your system's requirements, and secure with hose clamps or bulkhead mounts every 12–18 inches to minimize vibration and fatigue cracking.