Hop Up Kit, 420 Hemi Predator, Stage 3 Our Price: $387.00 Engine Kit, GX390/420, 420cc, +.200 Billet Crank, 88mm Forged Piston Our Price: $923.00 Hop Up Kit, 420 Hemi, Stage 4 Our Price: $1,075.00 Stud Kit, Head & Side: GX200, 6.5 OHV Clone, & 212 Predator Our Price: $36.60 Header, Mini Bike, Single, Side Outlet; GX200, 6.5 OHV, & 212 Predator; Flared End (1-5/16") Our Price: $24.99 Header, 212 Predator Ghost, Karting (Mount/Brace Included) Our Price: $47.82