K-Tuned K20 Upper Coolant Housing w/ Filler Neck - Includes Hose End and 16AN - KUW-20T-F02Applications: K20A cylinder heads K20A2 cylinder heads K20A3 cylinder heads K20Z1 cylinder heads K24A1 cylinder heads Feature: * 16OR (O Ring) Outlet and a 12OR (O Ring) Filler Inlet * Filler Neck offers both Hose End and 16AN Note: * Does NOT fit with the PRB manifold and throttle bodies with cruise control * Rad cap is not included We've taken input from guys running big turbo setups on this one. The integrated filler now clears up more room for big