Simplicity P2138 (38) 420cc Signature Series Two-Stage Snow BlowerSimplicity P2138 (38) 420cc Signature Series Two-Stage Snow Blower. 420cc Briggs & Stratton 2100 Professional Series 4-Cycle OHV Engine. Super Lo-Tone muffler reduces noise- keeps your neighbors happy. Dual ball bearings and cast iron cylinder sleeve protectors for increased longevity. Heavy-Duty Cast Iron Gear Case. Friction.