This is a New Bosch injector for the John Deere 8200/8400/9100/8110/8210/8410 & 8410T tractors. Bosch is the original OE supplier to John Deere for this injector. Although this is a new injector a core return of the old injector/injectors is required. CORE CHARGE: A core charge of $20.00 will be applied to your credit card account, if the core is returned within 30 days you will receive credit. Feel free to call our parts department at 800-891-8038 with any questions.