Exhaust System (Header), Michigan Mini Wedge, Spec Assembly Our Price: $80.90 Hop Up Kit, 224cc Predator, Stage 4 Our Price: $507.00 Hop Up Kit, GX200 & 6.5 OHV Clone, Stage 4 Our Price: $618.00 Hop Up Kit, 224cc Predator, Stage 3 Our Price: $331.00 Hop Up Kit, 208cc DuroMax, Stage 4 Our Price: $518.00 Engine Kit, GX390, 420cc , +.200 Cast Crank, 88mm Cast Flat-Top Our Price: $321.00