Speedmaster 1-147-091 Pontiac HiRise Aluminum Intake Manifold Satin 326 350 389 400 421 428 455

The Speedmaster 1-147-091 is a high-rise aluminum intake manifold designed for Pontiac V8 engines, offering a lightweight alternative to cast-iron factory units. The satin finish provides a clean, professional appearance while the aluminum construction delivers improved durability and heat dissipation. This manifold is engineered to fit Pontiac 326, 350, 389, 400, 421, 428, and 455 cubic inch displacement engines, making it a versatile choice for classic Pontiac restoration, performance upgrades, and engine rebuilds.

The HiRise design enhances air intake geometry and supports higher RPM performance while maintaining compatibility with standard carburetor mounting. Built from quality aluminum, this manifold resists corrosion and oxidation better than traditional cast alternatives, ensuring long-term reliability. Whether you're restoring a vintage Pontiac or upgrading an existing engine platform, this intake manifold combines proven engineering with aesthetic refinement.

Key Features & Benefits

• Aluminum Construction: Lightweight material reduces overall engine weight while improving heat dissipation compared to cast-iron designs.
• HiRise Design: Optimized intake port geometry supports higher RPM operation and improved air delivery.
• Multi-Engine Compatibility: Fits Pontiac 326, 350, 389, 400, 421, 428, and 455 cubic inch displacement engines.
• Satin Finish: Professional appearance with smooth satin coating resists corrosion and oxidation.
• Carburetor Mount Ready: Standard mounting provisions accommodate traditional carburetor applications.

Specifications

Ideal Applications

• Classic Pontiac engine restoration and rebuild projects
• Performance engine upgrades for Pontiac V8 platforms
• Vintage muscle car restoration and customization
• High-RPM engine tuning and carburetor-based performance applications