Looking to plumb your upper radiator hose out of -20AN Braided Hose? Look no further then FSD's fabricated aluminum upper coolant neck. This is a cast aluminum coolant next modified to adapt to a -20AN Hose.
Whats Incuded?

• (1) Fabricated -20AN Thermostat Housing

Features:

• 1998.5-2022 Cummins -20AN Thermostat Housing
• -20AN
• Sold As: Each

Note: Does not work with 6.7 Cummins using the factory exhaust pressure sensor mounted on the factory thermostat housing