Speedmaster Pontiac 326 350 389 400 428 455 MID-AIR MidRise Polished Aluminum Intake Manifold

The Speedmaster Pontiac MID-AIR MidRise Aluminum Intake Manifold (Model 1-147-074) is a premium polished aluminum intake manifold engineered for classic Pontiac engine blocks. This manifold is specifically designed for Pontiac 326, 350, 389, 400, 428, and 455 cubic-inch engines, making it an ideal upgrade for muscle car restoration, performance tuning, and street or strip applications. The polished finish delivers both functional airflow optimization and show-quality aesthetics.

Constructed from durable aluminum, this MidRise design provides excellent volumetric efficiency while maintaining a compact profile suitable for engine bay installations. The manifold's flow characteristics and mounting design are tailored to Pontiac's classic big-block and mid-block platforms, offering improved throttle response and power delivery compared to stock units. Whether you're rebuilding a vintage Pontiac GTO, Firebird, or another Pontiac muscle car, the MID-AIR manifold combines reliable performance with the polished appearance that serious enthusiasts demand. The aluminum construction resists corrosion and heat distortion, ensuring long-term durability under demanding driving conditions.

Key Features & Benefits

• Pontiac Engine Compatibility: Engineered specifically for Pontiac 326, 350, 389, 400, 428, and 455 cubic-inch engines.
• Polished Aluminum Construction: Premium polished finish provides both improved aesthetics and corrosion resistance.
• MidRise Design: Compact profile optimizes airflow and throttle response while fitting modern engine bays.
• Performance-Oriented: Supports muscle car restoration, street performance, and racing applications.
• Durability: Aluminum resists corrosion and heat distortion for long-term reliability.

Specifications

Ideal Applications

• Classic Pontiac muscle car engine rebuilds and restorations
• Street performance tuning and modifications
• Racing and high-performance engine builds
• Vintage Pontiac GTO, Firebird, and Trans Am upgrades