This Listing is for 1 NEW High Performance Racing CDI Fits: Honda CRF230F 2003-2012 Function: These are AC fired CDI to boost performance Racing Coil Improved Timing curves Higher Rev Limit Increased spark Energy Easier Starting Below is a satisfied costumer. Just wanted to say Thank You for an excellent purchase! The CDI gave my bike amazing power gains, and I know it also improves mileage. I had converted my CRF230F to a street legal bike and this CDI gave the machine enough power to pull high gear, saving the motor from overrev. I notice improvements in low RPMs all the way to high RPMs, where torque is improved. Now I can ride in town idling in 4th gear instead of revving 3rd gear. All of this for $16, you must be kidding me! You could charge much more if you wanted to. Have a wonderful day! Dan Package Include: 1 x AC CDI Shipping and Handling: FREE USPS First Class Shipping Items will be shipped out within 48 hours after payment cleared. VIa USPS First Class Mail Return / Refund Return is accepted within 60 days after the buyer's receiving the item. If this item is defective upon receipt, customer has up to 60 days from date of receipt for exchange of a new one. Include your name, address, item, daytime telephone, how you paid, and if you are requesting a refund or exchange. After getting the returned item, we will refund the customer at the item's price ( excluding the shipping costs to and from).