the isuue is not limited to the tru dual, it involves any free flowing exhaust. reducing the backpressure, leans out the mixture, which causes high engine and exhaust temps. granted, the twin cam motor is designed to run hot, due to the lean mixtures mandated by the current epa regulations, but excessive heat is not good for any engine. i would certainly recommend a fuel management system, properly tuned, it will drop your engine temperature and make the bike run better