HardDrive Oil Pressure for Harley Davidson Replacement Gauge Kits (60 PSI) - One Size Oil pressure gauge housings & mounts are CNC machined from billet aluminum, available in a beautiful chromed or black anodized finish, the mounting bracket positions the gauge on the rockerbox cover. The new precision gauge supplied in each kit is liquid filled which dampens the internal movement for improved gauge reliability, complete with chrome plated fittings, lines & O-rings for easy installation.