MIP No.1.5 Pucks are a direct update for those users that find No.1 Pucks screws are coming in contact with the aluminium outdrives over time. By switching over to the taller No.1.5 Pucks it will effectively eliminate the chance of the capturing screw head coming in contact with the outdrive face during wear or articulation, since the screw head is now up and out of the way. And being that the No.1.5 Pucks is taller there is now more surface area for the system to spread load, which will improve overall wear. No.1 Pucks and pins will always be usable in a bind but MIP recommend the use of No.1.5 Pucks. They are also a direct replacement for the front and rear diff assembly of the recently introduced MIP B64 13.5 performance bundle package. Also available as a rebuild kit are the No.1 Pucks that are used for the B64 centre diff assembly.