Mastodon Chevy Small Block 350 – 400 Dual Plane Intake Manifold

Aluminum dual-plane intake manifold for Small Block Chevy 350 / 400. Dual-plane (split-plenum) design optimised for the street and mild performance — strong throttle response from idle, peak torque around 3500 RPM, and useful power right through to ~5500 RPM.

The geometry is the proven Performer-style architecture — works equally well with a square-bore (Holley) or spread-bore (Edelbrock) carburetor, and gives the part-throttle drivability that single-plane "race" manifolds give up.

Specifications:

• Application: Small Block Chevy 350 / 400 (works on 283, 305, 327 also)
• Type: Dual-plane aluminum
• Carburetor pad: Square-bore + spread-bore compatible (4150 / 4160)
• Operating range: Idle to ~5500 RPM
• Material: Aluminum (cast)
• Best for: Street, street/strip, mild performance builds