Add to Cart The item has been added 356447-SIMPSOVEREIGN-R1 - 18hp Twin Cylinder Horizontal 1" Shaft, Fits newer Simplicity Sovereign with Kohler TH18. Briggs Engine, Briggs & Stratton (356447-SIMPSOVEREIGN-R1) In Stock: 3 + $1,938.00 Free Shipping Add to Cart The item has been added Compare