1.75in Fitting Black

The 1.75in Fitting Black from ALLSTAR PERFORMANCE is a precision water pump adapter engineered for high-performance cooling systems in racing and custom automotive applications. This inline water pump fitting bridges hose and O-ring port connections, making it essential for builders constructing or upgrading engine cooling circuits where reliable flow and leak-free operation are non-negotiable. Designed for demanding environments, this fitting ensures compatibility across a wide range of performance and race-spec water pump configurations.

Constructed from aluminum and finished in black anodized coating, the 1.75in fitting features a 1-3/4 inch hose barb connection on one end and a 1-1/4-12 inch O-ring port on the other, delivering a secure mechanical and sealed interface. The aluminum construction provides lightweight strength while resisting corrosion in coolant-rich environments, and the anodized finish enhances durability and aesthetic integration into modern engine bays. The barbed hose connection promotes positive grip on hose stock, while the precision O-ring groove ensures proper sealing without over-torquing or damaging softer gasket materials.

This fitting is ideal for engine builders, race teams, and automotive enthusiasts installing or servicing water pump systems in custom and competition vehicles. Installation is straightforward—the hose barb accepts standard automotive coolant hose with a secure clamp, while the O-ring port threads directly into compatible water pump housings or manifolds with standard 1-1/4-12 UNF fasteners. Whether you're assembling a street performance engine or a full-race package, the ALLSTAR PERFORMANCE 1.75in fitting provides the reliable, leak-resistant junction point your cooling system demands.