GOOFIT 6 Pin CDI Ignition Coil Set for GY6 150cc Yerf Dog Spiderbox Scooter Go Kart Fit for 4 stroke GY6 150cc scooter go kart Unlimited Version, removed factory rev-limiter to reveal the true potential of your engine Reset your ignition advance curve for better acceleration, up to 10% acceleration boost Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)