Ford 351w Stealth

The WEIAND Ford 351W Stealth intake manifold is a square-bore, dual-plane aluminum design engineered for small block Ford engines. This naturally finished manifold delivers optimized air distribution across a wide RPM band, making it a proven choice for street, strip, and marine applications where consistent mid-range torque and throttle response matter. The Stealth designation reflects WEIAND's tuned port runner design that balances velocity and volume for reliable performance without requiring exotic fuel mapping or race-only setup.

Weighing 21.27 lbs and measuring 14.35 × 7.15 × 22.7 inches, this manifold fits within the footprint constraints of classic and crate engine installations. The dual-plane runner design segregates cylinders into two distinct flow paths, reducing siamese effects and promoting even fuel charge distribution—critical for carbureted engines and single-plane applications requiring improved low-end responsiveness. Aluminum construction provides thermal stability while keeping rotating mass minimal, a consideration for engines tuned for quick spool-up or responsive acceleration off-idle.

This manifold is purpose-built for enthusiasts restoring or upgrading small block Ford powerplants—whether in vintage muscle cars, hot rods, truck builds, or marine engines where reliability and consistent power delivery across varying load conditions are non-negotiable. The square-bore mounting flange ensures compatibility with standard small block Ford carburetor platforms and aftermarket intake adapters, simplifying integration into existing or custom fuel delivery systems.

WEIAND's Stealth line represents a middle ground between street-friendly compromise and track-focused extremes—offering the air velocity benefits of a high-RPM design without sacrificing the low-RPM tractability that daily-driven and working engines demand. The natural aluminum finish resists corrosion better than bare cast iron alternatives, a practical advantage for salt-air and moisture-heavy environments.