The Skunk2 Pro D-Series Intake Manifold is engineered for maximum Honda performance. Featuring an enlarged plenum and oversized runners, it boosts hp and torque gains up to 15%, with no tradeoff of mid-range power. An optimized 66mm throttle body and machined runner exits facilitate superior airflow and enable top-end power gains. Crafted from 356-aluminum, precision CNC-machined for a strong fit, and tested for quality, this manifold is a direct-fit replacement for D-series engines. Compatible with larger-bore Skunk2 throttle bodies and other similar products, its Genuine Skunk2 nameplate and smooth design make it the ideal choice for the street enthusiast.