i previously owned a 2000 and had aftermarket amps subs and speakers, had problems with trunk space and it was really loud it felt really the punch from the bass no problem with that so i sold the car, and bought the 06, just dont want to spend a lot again on it and maybe got the aftermarket...
its the shaker 1000 amps connector, Some come with that harness without having the shaker 1000 or either the shaker 500 option stereos, (if im not wrong, if in the production line didnt have the normal wiring harness they install that one) past year I found a v6 on the junkyard with that wiring...
2 months ago ordered through rockauto all coil packs and sparkplugs, all oem, no replicas or knockoff, also best price, just search for a coupon code before purchase, theyll give you 5% off