right now i have stock manifolds a gutted cat and hooker catback how much louder will it be when i hook up the jet hot lt's to the hooker catback?

 

actually when I put mine on they were pretty quiet, the loud noise underneath my feet went away once I put them in, I guess the bottleneck of the stockers causes some bad turbulance or something, many people said it sounded basically stock at idle, maybe a hair louder. The loudness comes at full throttle, thats when they wake up. If I were to explain the difference Id day the exhaust tone became lower sounding and meaner, more musclecar sounding. They made a pretty big difference with power. If you plan on head work with a cam, then the tone will be much louder overall