This is what your Milwaukee 8 equipped Harley-Davidson is missing. Capable of over 180HP with the correct supporting engine mods.

It’s been the countless hours of testing with the M8 models that make this kit perform flawlessly. We’ve proven this kit to be reliable for everyday riding, it runs perfect with it’s cooling system & it sits nice & tidy for comfort on those longer trips. Not only are you getting an enormous power increase, but the look & sound of the supercharger does not compare.

Ordering this kit through the DarkSide team does not stop there, we’re only a phone call away to assist you through the installation process. We’re available to answer all your questions and & also to guide you to achieve your horsepower goal.

Kit includes:

  • Rotrex Supercharger
  • Air filter
  • Intake plenum
  • CNC primary case & derby cover to suit
  • Supercharger side plate
  • Oiling system
  • 1L bottle of supercharger specific oil
  • Main pulley
  • Idle pulley
  • Pulley tensioners
  • Belt
  • Blow off valve
  • Injectors
  • Silicone joiners & clamps
  • Hoses & clamps
  • Front mount intercooler
  • Oil cooler & fittings
  • All mounting nuts & bolts
  • Extended gear shifter


The DarkSide Custom Harleys Supercharger Kit – Milwaukee 8 Stage 1 requires the following additional components for installation:

  • Exhaust upgrade
  • Heavy duty clutch
  • Power Commander V ECU Tuner
  • Dyno tune

We strongly recommend the purchase of the DarkSide Custom Harleys High Grade M8 Compensator. The stock HD compensator is known to fail in standard bikes, let alone on bikes with boost.

Kit only works with models with forward controls.

Available in black or chrome. Raw available on special request.

Be sure to contact the DarkSide team for expert advice on fitment for your bike before ordering.