Feel the Boom!!! Get out of the pits and on the fast track to higher scores with the latest edition to the Hot Rod family, the new Pro Stock Pearl.â„¢ The MONSOONâ„¢ Pearl Reactive Coverstock soars through the driest front ends for big length and blazing backend. Powering the Pro Stock Pearlâ„¢ is the notorious FE2 Thunder Weight Block making for a potent combination that crushes racks with no remorse. When it's time to put up or shut up, which will you choose? Shut'em up with the Pro Stock Pearlâ„¢!