Vacuum Line Caps 20 Pcs. C CAPS (20 KIT )

The Vacuum Line Caps 20 Pcs. C CAPS (20 KIT) by Racing Power Co-Packaged is an essential component for any serious engine builder, mechanic, or automotive enthusiast managing vacuum system modifications. Whether you're adapting manifold vacuum ports during a carbureted engine swap, disconnecting emissions-controlled vacuum lines, or diagnosing vacuum leaks on a restored classic, this assorted-size cap kit provides the blind plugs needed to safely seal unused vacuum ports. These caps prevent unwanted air ingestion that can cause rough idle, stumbling, or erratic fuel mixture control—critical concerns in custom engine builds where original vacuum routing no longer applies.

Constructed from durable black plastic, these vacuum line caps feature a compression design that securely grips tubing without requiring adhesive or special tools—a practical advantage in the shop or during roadside tuning. The assorted sizes accommodate the variety of vacuum line diameters found across different engine platforms, from small 3/16-inch hoses to larger 5/8-inch lines common on big-block and stroker applications. The non-corrosive plastic construction resists fuel, coolant, and oil exposure, ensuring long-term reliability even in harsh underhood environments where metal alternatives might rust or degrade. Each cap seats firmly to prevent pressure loss while remaining easy to remove if vacuum routing needs adjustment during development or troubleshooting phases.

Hot rod builders, performance tuners, and restoration specialists rely on this 20-piece kit to handle multiple ports across single or multi-vehicle projects without running short mid-job. The assorted sizing eliminates guesswork when capping unknown hose diameters, and the compact kit packaging (3.9 x 0.65 x 5.9 inches) fits easily in toolboxes or shop drawers for grab-and-go accessibility. Installation requires no special knowledge—simply push the appropriately sized cap firmly onto the vacuum line until it seats snugly. This kit is indispensable for carb conversions, EFI swaps, emissions delete modifications, or any engine modification where vacuum circuit reconfiguration demands reliable port sealing.