Haven't heard straight pipes on this truck but I'd imagine they are a lot louder. This is pretty aggressive sounding compared to the other Flowmasters on this truck but compared to straight pipes I'd guess it's fairly mild. I can definitely easily carry on a conversation in the cab with the windows up.
Had my exhaust installed (Flowmaster Outlaw)... I posted a few (pretty poor audio quality) clips in this thread. I was worried about the black tips but I think they look pretty awesome. Here's a photo:
Had this installed today. Thought I'd post some clips -- sorry about the crappy video quality.
Startup:
Revs:
Acceleration:
Definitely some drone, not unbearable. Only noticeable at ~ 1500 RPMs, and definitely more noticeable at faster speeds. I love the sound though!
I drive ~ 20 miles on the highway to work each day and about 1.5 miles off the highway and have been averaging ~ 17.4... I've averaged over 20 on longer trips on cruise. (5.3L A/T)
Good thing to be busy with...
I haven't been able to find any clips of the 14' 5.3L w/ the 10 series but I went ahead and ordered the outlaw system. Should be here next week sometime, I'll post some clips after the install if anyone is interested.