GSR/B18C1 Upper Coolant Housing w/ Filler Cap

Application:  B18C1 Heads GSR Heads Feature:  -16OR (O-Ring) Outlet and a -12OR (O-Ring) Filler Inlet Note: * Rad Cap not included K-Tuned is known for its innovative  and popular cooling components for k-series applications. Countless requests have brought forth the new b-series line. The B18C1/GSR Upper Coolant Housing offers a versatility you won't get anywhere else. Begin with selecting a basic setup or setup with optional filler. Next you can select the inlet style/size being used whether its standard silicone hoses or -AN fittings. On the filler neck option the filler neck and overflow swivel and allow you to point the overflow fitting in any direction to allow clean and simple setup.