Stud Kit, Head & Side: GX200, 6.5 OHV Clone, & 212 Predator Our Price: $36.60 Hop Up Kit, 212 Predator Hemi, Stage 1 Our Price: $53.66 Hop Up Kit, 224cc Predator, Stage 1 Our Price: $59.33 Engine Kit, GX390/420, 420cc, +.200 Billet Crank, 88mm Forged Piston Our Price: $923.00 Engine Kit, 236cc for Tillotson 72mm Block, Stroker Kit Our Price: $229.00 Stud Kit, Head: GX200, 6.5 OHV Clone, & 212 Predator Our Price: $20.68