![Speedmaster 1-147-078 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black]](https://cdn11.bigcommerce.com/s-o2urolu8d5/images/stencil/1280x1280/products/358725/388266/61I7gDei11L__93729.1787166755.jpg?c=1 "Speedmaster 1-147-078 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black]")
![Speedmaster 1-147-078 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black]](https://cdn11.bigcommerce.com/s-o2urolu8d5/images/stencil/500x659/products/358725/388266/61I7gDei11L__93729.1787166755.jpg?c=1 "Speedmaster 1-147-078 Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black]")
The Speedmaster MID-AIR™ MidRise Aluminum Intake Manifold (Part# 1-147-078) is purpose-built for Oldsmobile 400, 425, and 455 cubic-inch engines, delivering a lightweight aluminum construction with a mid-rise plenum design engineered to improve airflow and help maximize power output across a broad RPM range. The striking black finish gives your engine bay a clean, performance-focused appearance.
Designed as a direct-fit solution for compatible Oldsmobile big-block applications, this intake manifold offers a bolt-on upgrade path for street performance and mild competition builds. Trust Speedmaster's proven engineering to provide a quality replacement or performance upgrade that keeps your classic Oldsmobile engine running strong.
MPN1-147-078
UPC840136566984
![Speedmaster 1-147-099 Oldsmobile 400 425 455 Low-Rise Aluminum Intake Manifold [Black]](https://cdn11.bigcommerce.com/s-o2urolu8d5/images/stencil/500x659/products/359320/388927/61bG7lC21ML__05879.1787166981.jpg?c=1 "Speedmaster 1-147-099 Oldsmobile 400 425 455 Low-Rise Aluminum Intake Manifold [Black]")
