Black Silicone Coolant Bypass Cap, 7/8 inch ID 11713 and you're done

and you're done

The 4-ply reinforcement results in a working pressure rating in excess of 19 psi (78 psi burst pressure) and a 5

It is designed specifically for connecting 3 3/8" (86mm) OD metal intake pipes

25 and 3613-3

Silicone hose is for use on intake systems only

Black Silicone Coolant Bypass Cap, 7/8 inch ID 11713 and you're doneThis cap features the same water and coolant compatible silicone rubber formulation as our silicone coolant hoses. It is designed for capping off coolant bypass or vacuum fittings, but it can also be used to protect fittings in storage. This size has a 22mm (7 8") ID, 30mm (1 3 16") OD and measures 38mm (1 1 2") Long overall with a 30mm depth. Maximum temperature 392 F (200 C). Operating pressure rating 42 psi. Black silicone rubber only. Sold