Aftermarket Poly Engine Intake Manifold to Water Pump Molded Bypass Hose. In 57, it was used on all Poly’s except for P31’s & D65’s with Engine #’s from KV1003C to KV1135C and after KV14985C and except for D67’s from 1002C to 1019C and after 3168C. In 58, it was used on all Poly’s except for the Fury’s after P2W4451 Canadian Built. In 59, it was used on all Poly’s except for the Fury’s. Then from 60 to 67 all Poly Engines used this Bypass Hose. The Poly Engines were used up to 1966 in U.S. built Vehicles and up to 1967 in Canadian built Vehicles. Replaces OEM Part # 1730366.