0-Ring Side Bell

The O-Ring Side Bell from FRANKLAND RACING is a precision-engineered component designed for engine builders and performance mechanics seeking reliable throttle-body or intake manifold sealing solutions. This compact bell-shaped fitting serves as a critical junction point in fuel injection and air intake systems, where consistent sealing prevents vacuum leaks and ensures accurate engine tuning. Whether you're building a street machine, road-race platform, or high-revving competition engine, the O-Ring Side Bell maintains integrity under thermal cycling and vibration—two factors that degrade standard gasket materials over time.

Engineered with a grooved sealing surface, this fitting accommodates a precision O-ring that creates a dynamic, reusable seal far superior to traditional cork or paper gaskets. The bell's offset mounting geometry allows installation in tight engine bay configurations without requiring bulky adapter plates or additional fabrication. At just 0.02 lbs, the minimal weight footprint makes it ideal for weight-conscious builds, while the compact 6.8 x 0.7 x 6.95-inch profile ensures it integrates seamlessly into OEM and custom intake designs. FRANKLAND RACING's attention to tolerance and finish quality ensures concentricity during assembly, reducing the risk of eccentric seating that compromises flow characteristics.

This component is essential for tuners and engine builders working on carbureted, electronic fuel injection, or turbo applications where manifold vacuum leaks trigger rich or lean conditions and ignition timing issues. Installation requires only hand tools and standard O-ring replacement—no welding, epoxy, or permanent modification. The O-Ring Side Bell proves invaluable in custom intake manifold projects, aftermarket throttle body upgrades, and high-boost engine platforms where repeated thermal stress demands a reusable seal design. For those building engines that demand precision and reliability, this FRANKLAND RACING fitting delivers performance-grade engineering at a competitive price point.