Intake Manifold Fitting

The TRANS-DAPT intake manifold fitting (model 9515) is a straight adapter designed to bridge incompatible coolant, vacuum, or fuel system connections in engine bay modifications. Built for mechanics and engine builders who need reliable solutions when upgrading manifolds, carburetors, or fuel injection systems, this fitting eliminates the need for custom fabrication and gets your build back on schedule. Whether you're transitioning from a factory setup to an aftermarket intake or adapting legacy components to a modern engine bay, this adapter delivers the straightforward connection integrity that serious projects demand.

The intake manifold fitting features a 1/2 inch NPT (National Pipe Thread) male connection on one end and a 5/8 inch hose barb on the other, allowing seamless integration with both rigid pipe systems and flexible hose runs. Forged from solid steel and finished in durable chrome plating, this adapter resists corrosion while maintaining clarity under underhood heat cycles—critical for long-term reliability in high-vibration engine environments. The straight configuration eliminates bends that can restrict flow or create turbulence, ensuring consistent pressure delivery for cooling systems, vacuum lines, and fuel rail applications. At just 0.15 pounds with compact dimensions (2.75 × 1.25 × 3.95 inches), it fits tight engine bays without adding bulk or weight.

This fitting is ideal for restomods, engine swaps, and custom fuel system builds where original OEM fittings no longer align with your manifold or carburetor ports. Engine builders choosing non-stock intake manifolds, EFI conversions, or performance upgrades will appreciate the NPT-to-hose-barb configuration, which bridges the gap between legacy plumbing and modern braided hose assemblies. Installation requires only basic wrenching—hand-tight plus a quarter-turn with an open wrench on the male fitting—and pairs perfectly with standard coolant hoses, fuel line, and vacuum tubing. Verify port size compatibility with your specific intake manifold before ordering to ensure proper fit and function.