You may need a GFB flange adapter when fitting on a new valve. That is because sometimes, OEM valves are connected to a flange. In the past, drivers used to try to make their own part and replicate the threading, but that can be costly and difficult. It has to be a tight, accurate fitment. The right adapter portrays the same styling as the factory mount, screwing right on in seconds. It is paramount to be sure that the location is correct. While it is designed to be a direct fitment, a flange adapter may ride out on the sides further than the OEM coupling. Clear any interference with the hose before installation.
A blow off valve often fits onto a pipe and is then reinforced by an O-ring. From there, it is a matter of precision. The direct fit BOV adapter takes the place of the original flange so that the mounting stays the same. All it really takes is screwing the blow off valve onto the mount. This is the same process as a pipe mount fitting, with the difference being the flange. In fact, you will use the same hardware with the direct fit BOV adapter. After you are finished, test each connecting point to confirm tightness. The hoses that run from the blow off valve may need zip ties at the ends. So long as there is adequate clearance, your direct fit BOV adapter should not betray any give at the seams.
In certain cases the installation procedure may vary slightly. A blow off valve could require connection at the bottom. This is not a major issue, although it can be confusing. Instead of the traditional route of going over the top you will instead be threading the BOV flange connector to the bottom of the valve. If this is necessary for proper fitment, you will be completely switching out the OEM base.
Each Go Fast BOV comes with directions but not model-specific adapters. Measure all components prior to ordering. Your car’s manual should include specifics as to the diameter of flanges and hoses.