Grunt Dual Battery Upgrade Kit

Looking for more power and extended range for your Grunt FE or EVO? The Dual Battery Upgrade Kit might be exactly what you're looking for. 

With the purchase of each kit, either with or without the battery, you'll receive:

• Dual Battery Harness
• Controller Contactor Cable
• Motor Controller Communication Cable 
• A Personalized Call with Our Engineers: They will guide you through the update process. This call is required for the update.