Thumper Fab RZR Roof - Level 3 with Rockford Fosgate Roof RZR Thumper Fab Thumper Fab RZR Roof - Level 3 with Rockford Fosgate Thumper Fab RZR Level 3 Roof w/ Rockford Fosgate If you're looking to add some THUMP to your off-road vehicle, the best choice for you is the Thumper Fab. Thumper Fab, established in 2019 in Marshall, Texas, U… Matt Druey 4 years ago