Speedmaster Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold Black 1-147-078

The Speedmaster MID-AIR™ MidRise aluminum intake manifold is engineered for Oldsmobile 400, 425, and 455 big-block engines, delivering improved airflow and reliable performance. Constructed from aluminum with a black finish, this mid-rise design provides a balanced approach to intake velocity and fuel distribution, making it suitable for street and mild performance applications. The manifold is specifically designed to fit these classic Oldsmobile engine platforms, ensuring proper port alignment and sealing for consistent operation.

This intake manifold is an ideal choice for enthusiasts restoring or upgrading their classic Oldsmobile muscle cars and street rods. The aluminum construction offers weight savings compared to cast-iron alternatives while maintaining durability and thermal stability. Whether you're rebuilding a stock engine or upgrading your Olds 400, 425, or 455, this Speedmaster manifold provides a proven foundation for improved intake tract efficiency and dependable engine performance.

Key Features & Benefits

• Aluminum Construction: Lightweight aluminum body reduces overall engine weight while maintaining structural integrity and heat dissipation.
• MID-AIR™ MidRise Design: Engineered mid-rise profile optimizes air velocity and fuel atomization for balanced street and performance use.
• Oldsmobile Big-Block Fitment: Specifically designed for 400, 425, and 455 cubic-inch Oldsmobile engines with proper port matching.
• Black Finish: Durable black coating provides a professional appearance and corrosion resistance.

Specifications

Ideal Applications

• Classic Oldsmobile muscle car engine rebuilds and restoration
• Street rod and hot rod engine upgrades
• Performance intake manifold replacement on Olds big-block platforms
• Custom engine builds using Oldsmobile 400, 425, or 455 blocks