i have a single straight pipe branching off with a y pipe into duals with 4 inch tips and im looking for more of a louder exhaust so im curious if installing SLP loudmouth resoantors either right in front of the tips or somewhere in the piping will make it a little louder. let me know what yall think id hate to buy these for nothing if they wont make a difference.

 

Don't resonators decrease sound?