I installed the headers last weekend. Took me all day to install. The right side took less than an hour to do. The left side (driver) took me the rest of the day. I stripped one of the bolts going into the head (the last one). Ended up taking the headers off like 3 times trying to get everything lined up. I couldn't do anything (well, didn't feel like it) to the head that I stripped so I just got a heavier duty bolt and forced it in. Just hoping I'll never have to take the headers off for as long as I own the truck.
The headers did look good quality. I'm sure they are nothing compared to JBA headers like V10Sport has but for $200 I think they are a good deal.
After installing them I haven't noticed any difference in power and its not any louder. My gas milage did change from 6mpg to 13mpg. But I can't tell if that was from the headers or not since I did other mods along with that. Didn't lose any low end power, still can smoke the tires without a problem and it's fun with posi going sideways through an intersection.
Sorry it was sooo long.
Any one have any other questions? If anyone wants pics of the headers PM or e-mail me and I'll send you some pictures.