O'Dawgs Coolant Hose Reroute Kit
From FICMrepair.com

When installing an O'Dawgs intake manifold, this kit is used to allow for re-circulation of coolant to the degas/coolant overflow bottle allowing coolant to flow at OEM rates. While there isn’t much to the kit, the components are purpose engineered.
Kit Includes:
1ea. T-fitting (3/4" x 3/4" x 5/8" )
1ea. T-fitting (3/8" x 3/8" x 3/8")
1ea. 5/8" HD Silicone Hose (200psi / 350 degree)
4ea. Hose Clamps
So how does this kit install?
The 5/8" hose connects: oil cooler outlet to heater core hose (behind the max A/C control valve) - Use the 3/4×5/8×3/4 Tee fitting to splice it in.
The 3/8×3/8×3/8 Tee fitting seals off the degas bottle. You take the original vent hose (coolant port on the intake manifold to the degas bottle), cut it in half and splice one of the halts into the radiator to degas bottle hose.