This was a reply from gary @ Superbike shops on the preds popping with the white bros pipe. He has set up a message board for predator owners for the latest mods and info. Go to (esuperbikeshop.com) then click on services at the top of the home page, then a drop down menu will say message board.


WE ARE WORKING ON IT-BUT THE STOCK HEADPIPE IS WAAAYYY TO BIG. IF YOUR ARE RUNNING THE WB MUFFLER, DO NOT RUN ALL OF THE DISCS-IT WONT HAVE ENOUGH BACKPRESSURE, & IT WILL SEEM AS IF YOU ARE HITTING THE REVLIMITER TOO QUICK. ON THE RACE ENGINES WE ARE DEVELOPING FOR POLARIS, WE HAVE FOUND A GOOD PIPE DESIGN WITH SMALLER HEAD PIPES, AND IT MAKES 8 MORE HP IN THE BOTTEM & MIDRANGE-CAN YOU SAY EAT A RAPTOR UP! OUR R&D ENGINES FOR POLARIS ARE MAKING 15 MORE HP THAN STOCK, & WE ARE STILL ONLY 500CC. WHEN WE RACED AT THE ST.LOUIS MONSTER JAM, WE HAD 14 MORE, & WE HAVE A LONG WAY TO GO. OUR 580CC KIT MAKES INCREDIBLE POWER-IT IS THE WAY TO GO. WE HAVE A AIRBOX/JET KIT COMING OUT THAT COMES COMPLETE WITH CARB NEEDLE, JETS & A PART FOR YOUR AIRBOX THAT INCREASES THROTTLE RESPONSE, MIDRANGE & HP. IT WILL BE AVAILABLE IN 1-2WEEKS IT IS VERY VERY COOL-I WILL HAVE IT PIXED ON THE WEBSITE SOON, WITH A DYNO RUN CHART-STAY TUNED TELL EVERYBODY-AND FOR YOU GUYS THAT ARE IN OUR PREDATOR PERFORMANCE CLUB, WE WILL ENTITLE YOU TO DISCOUNTS & FIRST DIBBS ON NEW STUFF, SO TELL EVERBODY TO COME CHAT WITH US-THANKS GARY