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This Gates straight heater hose fits 2014–2017 Freightliner Business Class M2 with Cummins ISL9 engines and serves as the top straight heater hose. The straight molded form matches the original heater plumbing layout and connection points. Replace the top heater hose when performing heater circuit repairs to restore proper routing and coolant flow to the heater core.
Gates 14-17 Freightliner Business Class M2 Cummins ISL9 Diesel Heater Top Straight Heater Hose
