Ferrea Intake Valve Set for Honda B17A1/B18C1/C3 33mm 5.47mm 25 Deg S-Flo

Ferrea Intake Valve Set for Honda B17A1 / B18C1 / C3 Upgrade your engine breathing with the Ferrea S-Flo intake valve set designed specifically for Honda B17A1, B18C1 and C3 applications. Precision-built to OEM fitment, this set of 8 valves delivers improved flow, reliability, and consistent performance under high RPM. Valve head diameter: 33mm — optimized for increased intake flow. Stem diameter: 5.47mm — durable, lightweight construction for reduced valvetrain inertia. Seat/face angle: 25° S-Flo profile — engineered to enhance air velocity and sealing. Quantity: Set of 8 valves — complete intake side replacement for 4-cylinder heads. Manufactured to Ferrea's exacting tolerances, these valves resist bending and wear while offering consistent spring loop compatibility and dependable sealing across the rev range. Ideal for mild to moderate performance builds, street/strip engines, and professional head work. Why choose Ferrea: reputation for race-proven materials, strict quality control, and improved flow characteristics that translate to better throttle response and potential horsepower gains when paired with proper head porting and tuning.