Thinking of swapping mufflers but got a question pertaining to my 340

Thats fine, really the only time it will be much louder is when your on it. I had a gibson performance mild muffler on my bronco and when I swapped to the gibson mwa it increased a little bit at idle and just a hair while cruising but very noticeable difference on the throttle. The demon sounds good now just wanted to try them and see if i could get a little throatier sound. If it doesnt work im only out 150 bucks. Normal price per muffler on gibsons website is around 100 bucks. Found em for 75 ish on jegs free ship plus they are stainless