HI, I RECIENTLY PURCHASED A FMF TURBINE CORE 2 SPARK ARRESTOR/MUFFLER FROM bikebandit.com FOR $107.99 PLUS SHIPPING ITS THE SAME AS THE ONE FROM JP MOTORSPORTS BUT HALF THE PRICE.THE ONLY MOD WAS TO CUT 1 3/4 inch OFF SMALL END OF INCLUDED PIPE. THE NAME IS FMF TURBINE CORE 2 UNIVERSAL SPARK ARRESTOR #020303