Speedmaster 1-147-099 Oldsmobile 400 425 455 Low-Rise Aluminum Intake Manifold Black

The Speedmaster 1-147-099 is a low-rise aluminum intake manifold engineered for Oldsmobile 400, 425, and 455 big-block engines. This black-finished manifold is designed to optimize air and fuel distribution to the cylinder heads, improving engine performance and throttle response on classic and muscle car builds.

Constructed from lightweight aluminum, this intake manifold reduces overall engine weight while maintaining durability. The low-rise profile is ideal for engine bay fitment in vehicles with limited vertical clearance and pairs well with standard and high-performance carburetor setups. Direct fitment for Oldsmobile 400, 425, and 455 blocks makes installation straightforward for restoration, upgrading, or performance tuning projects on vintage American muscle cars and street rods.

Key Features & Benefits

• Oldsmobile 400/425/455 Fitment: Direct compatibility with Oldsmobile 400, 425, and 455 big-block engines ensures proper sealing and performance.
• Lightweight Aluminum Construction: Aluminum material reduces engine weight compared to cast-iron alternatives while maintaining durability.
• Low-Rise Profile: Compact vertical design accommodates engine bays with space constraints and works with standard hood clearance.
• Black Powder Coat Finish: Durable black finish provides a clean appearance and corrosion resistance.

Specifications

Ideal Applications

• Classic Oldsmobile engine rebuilds and restorations
• Muscle car performance tuning and upgrades
• Street rod and hot rod engine swaps
• High-performance carburetor installation projects