No worries.
I 100% think the exhaust made a difference. Mostly around town were it would get bogged down in 2nd gear, now it doesn't worry it. Driving around town is much better i believe.
I also think it has differently help when stuck on a step hill, both standing start and powering up. Those were pretty much the reasons i wanted the exhaust. I wasn't expecting huge increases like some people may be looking for only to be disappointed.
I got mine with the muffler, so it really isn't that loud at all. Does not drone when driving in the cab and certainly does not sound like the Navs with 3" straight through systems. You get a little more turbo whistle and burble, bit lower tone. I like it.
Also they are 2.75", so less chance for clearance issues.
Hope this helps.
Pete