Building a blown big block or small block? This polished adapter plate from Speedmaster is what you need to mount a pair of 4150-style carburetors onto a 6-71 or 8-71 supercharger. The part number is PCE156.1001.01, and it’s made from aluminum with a mirror-like polish that looks killer under the hood. It’s basically the top plate that sits between your carbs and the blower, ensuring a proper seal and alignment. Whether you’re going for a classic pro-street look or max performance, this plate handles the job. It’s brand new in its packaging and includes all necessary bolt holes. Just bolt it down, set your carbs, and get ready to make some serious power—and noise. A must-have for any serious blower setup.