When commercial productivity counts, these units are our most popular contractor and municipal machines. The all-new discharge chute offers rugged wear and increased life productivity. They respectively feature a 29 HP V-Twin or 37 HP Vanguard EFI engine coupled to our largest 20", 4 or 6-blade, armour-plated impeller with 12 or 18 cutting points and dual shredding Piranha technology for up to 12:1 reduction and 4,400 or 5,050 cfm of suction power.