Features: Aftermarket Ignition Coil + CDI Unit + Rectifier Regulator + Starter Solenoid with Premium Quality. Made of high-quality plastic material, tough, high rigidity, and collision resistance, very durable and safe to use. Ignition coil helps to improve combustion efficiency and strengthen electrical performance. CDI eliminates rev-limit which restricts bike performance, and resets ignition advance curve for better acceleration. Rectifier regulator helps dissipate excess voltage, improve charging capability, and prevent overcharging battery. Stable characteristics, high reliability. Suitable for 150cc 250cc PIT Quad Dirt Bike ATV Buggy. Specification: Condition: Material: Plastic Main Color: Black Quantity: 4pcs Package Weight: Approx. 514g / 18.1oz Fitment: for 150cc 250cc PIT Quad Dirt Bike ATV Buggy Package Included: 1 x Ignition Coil 1 x CDI Unit 1 x Rectifier Regulator 1 x Starter Solenoid Note: Easy to install, but professional installation is highly recommended. The color of the actual items may be slightly different from the listing images due to different computer screens.