Description: -The K24 Intake Manifold Adapter is a simple and easy way to install K20 style manifold on K24 heads. -The recirculation fitting on K24s is typically part of the intake manifold which isnt on K20 intake manifolds. -We have designed the adapter to work with all K24 heads including the K24Z-Series (R40) heads. -The Intake Manifold Adapter can be installed either using our spring loaded tab or by tapping the head. -We use HNDA Bond or similar gasket maker as it provides a strong seal and when using the spring loaded tab when the adapter isnt under pressure there will be no chance of leak. -The spring loaded tab holds the adapter down with constant spring pressure to ensure a tight fit and seal. -The other option is using the provided blind hole you can easily tap the head for the second hole. Tools Required For Installation: (NOT INCLUDED) -Tapping the head will require a 6.5mm drill bit (to finish the blind hole in the adapter) -5mm drill bit (to drill the head) -M6x1.0 Tap.