4in Coupler

The SPECTRE 4in Coupler (SPE-9771) is a heavy-duty straight tubing connector designed for custom exhaust systems, intake piping, and intercooler applications in automotive performance builds. This coupler is ideal for builders and technicians who require durability and precise fitment in critical air and exhaust pathways.

Constructed from robust materials chosen for thermal stability and corrosion resistance, the coupler maintains concentricity critical for minimizing turbulence and pressure losses in high-boost environments. Its straight design eliminates flow restrictions that elbows and bends introduce, making it perfect for low-loss direct runs between turbo compressor outlets and intercooler inlets.

With a diameter of 4 inches, this coupler provides a universal fit across most performance applications, including LS engine swaps and turbocharger plumbing. Its lightweight design ensures easy integration into space-constrained engine compartments, making it a go-to choice for prototype custom builds.