The Skunk2 Pro Series Intake Manifold for Honda’s B18A, B18B, and B20 (non‑VTEC) engines is a direct high-flow upgrade over the factory manifold. Cast from aircraft-grade A356 aluminum as a one-piece unit, it features an oversized plenum and long, tapered runners optimized for strong mid- to upper-range performance. Skunk2 improved upon the classic Type‑R design by refining runner entries for smoother airflow transition.

Each unit is vacuum-tested, finished with Skunk2’s signature badge, and designed to support both naturally aspirated and turbocharged applications.

Key Features:

• Cast from aircraft-grade A356 aluminum

• Oversized plenum and long tapered runners for increased flow

• Improved runner-to-plenum transitions for better breathing

• 70mm throttle body opening (port-matchable to 74mm)

• Compatible with OEM sensor ports (bolt-on fit)

• Ideal for both turbo and naturally aspirated builds

Compatibility Notes:

• Not compatible with 1990–1993 models that employ EGR — those will require EGR delete or later ECU

• Not compatible with 1990–1995 fast-idle throttle bodies — a compatible Skunk2 throttle body (or equivalently port-matched unit) is required

• Do not use this manifold with B20Z heads

Fitment:

• Honda B18A

• Honda B20B

• Honda B20Z (non‑VTEC)

Included:

• (1) Skunk2 Pro Intake Manifold

• (1) Mounting Hardware & Gaskets