Originally Posted by BLM

From all the videos I've watched it seems that the exhausts that are "true dual" (such as ARK and FI) sound different from those that are constructed off of the OEM Y pipe platform. The latter tend to be a bit more raspy and metallic whereas the true duals are deeper. I can say that my setup sounds totally different from stock in terms of the overall sound. The OEM style y pipe designs tend to sound like a louder version of stock.

However, the rub here seems to be that the true dual systems are more susceptible to the hissing on decel (when a test pipe or HFC is added) than the OEM style systems.

Hoping ARK comes through with their HFC soon to fix this issue. The system is great otherwise.