As shown below, this kit is necessary to adapt the early style OEM level sensor to the stainless steel bracket included in the FHST.
COMPATIBILITY
NISSAN 350Z
Jan02 - Jan04
NISSAN FAIRLADY Z
Jan02 - Jan04
NISSAN SKYLINE COUPE
Jan01 - Mar03
INFINITI G35 COUPE
Jan01 - Mar03