429/460 Ford Stealth

The WEIAND 429/460 Ford Stealth intake manifold is a square-bore, dual-plane aluminum design engineered for big-block Ford engines demanding high-flow induction and responsive mid-range torque. Manufactured from natural-finish aluminum, this manifold combines precision casting with a proven dual-plane runner configuration that separates cylinder feeds to optimize velocity across the RPM band—a critical advantage for both street and competition applications where consistent power delivery matters.

The square-bore design ensures compatibility with a wide range of carburetor platforms commonly found on big-block Ford build platforms. Dual-plane runner separation is the key to the Stealth's performance signature: it isolates intake charge between cylinder groups, reducing reversion and crossover turbulence that degrades volumetric efficiency at part-throttle and cruise conditions. The lightweight aluminum construction reduces underhood mass while maintaining thermal stability needed for sustained high-load operation. At 23.54 lbs, the manifold integrates efficiently into existing engine bay configurations without requiring extensive clearance modification, and the compact 14.5 x 24.2-inch footprint is designed to fit within standard big-block installations.

This manifold is built for operators running naturally aspirated big-block Ford platforms—street machines, truck builds, and classic hot rods where mid-range response and part-throttle driveability are as important as peak power. WEIAND's Stealth line represents a balance between aggressive flow characteristics and real-world usability. The natural aluminum finish is compatible with both traditional engine detailing and modern powder coat restoration approaches, giving builders flexibility in the final presentation.

Each manifold ships as a single unit, ready for immediate installation on compatible big-block Ford heads. Verify carburetor and mounting compatibility with your specific engine configuration before purchase. The WEIAND 429/460 Ford Stealth (part number 8012) is a proven component in the performance induction category, with decades of OEM validation in factory big-block platforms and extensive field service across the restoration and performance market.