3.5" Intake Clamp with pin3. 5" Wiggins style clamp, heavy duty connector designed to securely join hard pipes and hoses in high performance and high boost applications. It prevents charge pipes from blowing off under extreme pressure while offering engineered flexibility to absorb normal engine vibration and movement. O Ring Seal: Features weld on ferrules or sleeves that are grooved with double O rings, ensuring an absolute, leak free seal without needing silicone couplers.