GM 4-71 3x2 Blower Top Manifold

Give your traditional blown hot rod the unmistakable look of three two-barrel carburetors with the Nystrom Performance GM 4-71 3x2 Blower Top Manifold. This cast-aluminum blower top is engineered to mount a trio of two-barrel carburetors directly above a GM 4-71 / 471 supercharger, creating a classic 3x2 induction setup with the appearance of traditional 1940s and 1950s hot rod speed equipment.

Originally developed for Detroit Diesel applications, the GM 4-71 supercharger became a hot-rodding favorite thanks to its availability, proven design, rebuildable construction, and unmistakable appearance. Our 3x2 top allows builders to combine that legendary supercharger with one of the most iconic carburetor arrangements of the traditional hot rod era.

The three carburetor mounting positions are spaced 5 inches on center and feature 5/16"-18 threaded mounting holes. The manifold is cast from 356 aluminum, giving it the authentic appearance of vintage cast speed equipment while providing a substantial foundation for your blower induction system.

Features

• Designed for GM 4-71 / 471 superchargers
• Mounts three two-barrel carburetors
• Traditional 3x2 / triple-carb blower configuration
• Carburetors spaced 5" on center
• 5/16"-18 threaded carburetor mounting holes
• Cast from 356 aluminum
• Traditional hot rod and vintage race-inspired appearance

A distinctive finishing piece for builders who want their GM 4-71 blower setup to look every bit as serious as it performs.

Nystrom Performance — Engineered to Outrun Time.