Originally Posted by Rookie Solara

HPI PRO 4 has some 2mm or even 3mm spacer, you can mount those right below the enigne (above the engine mount)..........it has the bling bling purple color that match you R40.........however, I don't understand why their engine will seat lower then the typical engine spec....you sure you used the right engine mount (I doubt there are other R40 engine mount) or Flywheel (again, same thing...)