Technical Info - HammerHead Performance Technical Info. Hammerhead Polaris Documents. 2017 Torpedo User / Maintenance. UM250R Owner's/Parts Manual. GL150 Parts. GT150 Owner's/Parts Manual. GT200 Owner's/Parts Manual. GT200 Wiring Diagram. GT250 Owner's Manual. GT250 Parts Manual. GTS150 Parts Manual. GTS150 Parts Manual, 2018 HammerHead Performance LLC 1000 Crowley Drive Product Support - Hammerhead Off-Road Hammerhead Off-Road ® has been distributing off-road vehicles in the United States since 2003. Our mission is to provide quality products with a focus on reliability, safety and innovation. The 40,000 sq. ft home office of Hammerhead Off-Road ® is centrally located in Flower Mound, Texas (a suburb of DFW) where we stock all of our parts inventory and diverse product lines.