Hop Up Kit, 420 Hemi, Stage 4 Our Price: $1,075.00 Hop Up Kit, 440 Duromax, Stage 4 Our Price: $1,276.00 Stud Kit, Head: GX200, 6.5 OHV Clone, & 212 Predator Our Price: $20.68 Header, RLV NRR5438, GX200, Mini Bike Down-Draft Style, Minimum Qty of 24 Our Price: $31.49 Hop Up Kit, 420 Predator OHV & 13/15hp Clone, Stage 4 Our Price: $1,149.00 Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 1 Our Price: $51.48