THESE GT-500 BOLT PATTERN ADAPTER PLATES ARE THE ULTIMATE UPGRADE FOR YOUR 99-04 LIGHTNING. THESE PLATES WILL ACCEPT ANY GT-500 BLOWER SET UP. FEATURES, STOCK OR TRICK INTERCOOLER BOLT PATTERN. ALSO FOR ADDITIONAL COST THE IAC OR TB ADAPTERS ARE AVAILABE. KIT COMES WITH O-RING, SST HARDWARE, AND BOOST PLUG. POSSIBLITIES ARE ENDLESS. YOU HAVE SEVERAL OPTIONS SO BE SURE TO READ CAREFULLY BEFORE ORDERING. LEADTIMES ARE USUALLY WITHIN 3 WEEKS, AND AS ALWAYS FREE SHIPPING!!
 
FOR INSTALL REFERENCE:  http://www.lightningrodder.com/forum/37-gen-2-harley-how-tos/342986-how-jps-m122-swap.html