Flexfab Silicone Hoses & Turbo Boots

Flexfab, LLC is an elastomeric engineering company founded in 1961 and headquartered in Hastings, Michigan, with additional facilities in Brazil, China, and England. The company designs and builds high-performance silicone hoses, tubing, ducting, flexible connectors, turbo boots, and bellows for industrial, automotive, aerospace, military, rail, and heavy-duty truck applications, and remains in active production. Northern Hydraulics supplies Flexfab silicone hoses and turbo boots from inventory and cross-references them within our catalog, carrying roughly 28 Flexfab line items across several series.

Flexfab Product Lines & Series

Flexfab’s coolant range spans the 5500 and 5515 Series (3-ply), the 5501 and 5581 Series (4-ply), the 5780 Series for high-temperature service, and the wire-reinforced 5508 Series. Heater hose lines include the 5521 and 5834 flagship series and the 5526 standard series. On the boost side, 7701 Series 3-ply fiberglass-reinforced turbo sleeves and 7700 Series hot- and cold-side turbo boots handle charge-air and turbocharger connections. NH stock concentrates on the most common of these, including 5508, 5515, and various 7700-series boots. Browse the Flexfab silicone hoses and turbo boots we carry, the wire reinforced coolant hose from the 5508 family, the non-reinforced coolant hose sizes, and Flexfab charge air couplers for CAC connections.

Cross-Referencing Flexfab Parts

Flexfab parts are specified by series, ply count, inside diameter, and temperature rating, so matching a replacement comes down to those dimensions rather than a single catalog number. If you have a worn silicone coolant hose, turbo sleeve, or charge-air connector and need a Flexfab equivalent or a dimensionally matched replacement, send us the series number or the bore and length you measured. Flexfab products remain in active production with no known superseded equivalents, so most line items cross-reference directly. For an obsolete part, an unlabeled hose, or a bulk order spanning multiple sizes, request a cross-reference quote and we will match it to the correct Flexfab series or a verified replacement.