Feuling Race Series Complete 521 Cam Chest Kit - 2017-2020 Oil Cooled Milwaukee 8 Models

Sale price$1,895.95
In stock


  • Aggressive pulling power with a “nasty” sound, the Reaper 521 grind will shine in 114” and larger cubic inch engines with added compression ratio
  • Ported cylinder heads are not required, but will complement the cam and add even more pulling power throughout the range
  • Stock throttle body produces an excellent powerband; use of a high-flow throttle body may increase peak power numbers
  • Kit includes Race Series oiling system: billet 7075 oil pump, Race Series lifters and High Flow billet aluminum camplate
  • Oil pump is 50% harder and stronger than the factory pump, holds tighter tolerances under temperature
  • Race Series hydraulic lifters have a full .200”
  • of total travel designed with slower bleed-down rate to handle heavy valve spring pressures, increase engine rpm before vavle float and feature increased roller clearance for steep-ramped camshafts and clearance for the M-Eight front exhaust camshaft lobe flange
  • Quieter and smoother engine operation
  • Increase oil pressure, scavenge volume and engine oil flow
  • 15-25 degree cooler engine temperatures
  • 15-30 degree cooler oil temperatures
  • 10-30 more PSI of oil pressure
  • Eliminate wet sumping, blow by and oily air cleaners
  • Heavy duty .165” wall one-piece pushrods reduce valvetrain harmonics and increase valve lift
  • High-flow air cleaner and triple-stepped exhaust pipe highly recommended
  • High-lift high-load valve springs are required
  • RPM range 2850-6250
  • Oil-cooled oil pumps provide 27% more pressure and scavenge gear volume
  • Twin-cooled oil pumps provide 30% more pressure gear volume and 53% more scavenge gear volume

  • Specs:
  • Type: Chain
  • Model: Race Series®
  • Grind: 521 Series
  • Intake Open: 17°
  • Intake Close: 34°
  • Intake Lift: 0.518"
  • Intake Duration: 231°
  • Exhaust Lift: 0.521"
  • Exhaust Duration: 243°
  • Exhaust Open: 51.5°
  • Exhaust Close: 11.5°
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