Those are not your typical lil red stacks.Those were bought at jegs for about 1/3 the price of original stacks.The muffler is built in.They sound very throaty but not too loud on the freeway.This truck was built on a budget with lots of shopping and research.The rims wre bought at jegs buy 3 and get 1 free.They wre under 300.00 delivered.The truck was almost down when I got sidelined with an obstucted bowel.I had emergency surgery followed by 10 days in the hospital.I am just now putting the finishing touches on the truck and with a new appreciation of God life family and friends.