According to BMC's website you use your original airbox screws:
CARBON DYNAMIC AIRBOX - SPECIAL VERSION
THE CDASP-05 -CARBON DYNAMIC AIRBOX- MUST BE INSTALLED EXCLUSIVELY ON CARS THAT HAVE ALREADY AN ORIGINAL FITTED AIR SENSOR BOSCH >PBT-GF30< (Ø 70mm). THANKS TO A SPECIFY ADAPTOR, THIS SPECIAL APPLICATION CONSENTS A DIRECT INSTALMENT OF THE CDA TO THE AIR SENSOR, GUARANTEEING AN EASY CONNECTION BETWEEN THE TWO COMPONENTS, REDUCING A GREAT DEAL OF WASTED SPACE AND CONVEYING MORE AIR TO THE ENGINE.
1 : REMOVE THE ORIGINAL AIRBOX.
2 : APPLY THE GASKET TO THE ENGINE SIDE OF THE FLANGE.
Remove the yellow paper from the gasket and apply the adhesive side in its place on the engine side of the flange.
3 : POSITIONING THE CDA. Once the original air box has been removed, position the CDA in the area obtained using the clamp (large mod.) provided with the kit. Use the support hanger to block the device onto a stable point of the engine space, shaping this completion according to the position located for the fixing.
4 : INSERTING THE AIR SENSOR TO THE ENGINE SIDE FLANGE. Orientate the CDA checking that the hole of the flange and the air sensor coincide. Subsequently fix the two components using the two threaded screws of the original air box. Please Note: In some cars it might be easier to effect the connection between the two bodies, so you have to remove the air flow sensor. In this case it is necessary to make sure the key is not inserted in the ignition other wise the central could lose data readings in its memory.
5 : APPLICATION OF THE INTAKE AIR TUBE. After positioning the CDA in the engine space apply the aluminium air tube that is supplied to the flange air side of the CDA, subsequently fixing with the clamp supplied (small model) then orientate the grip and position it in the area that consents withdrawal of outside air: pay attention not to orientate the opening in a low area of the car to avoid water eventually entering in.
did you glue it?
