I have the stage II B series kit on my car. Overall Iam happy with it, the "high temp coating" is just header paint which flaked off within 500 miles so I will be ceramic coating it all this winter. Nice people to deal with if you have any problems just call them up and they will help you as much as possible.
I hate to bad mouth people, but it's definitely not worth the $. I was extremely disappointed when I got my kit. Rather poor design, I could do better mig welds, terrible coating, and ask Bentley about header flanges and other leaks. I actually have no desire to even put it on my car.
I'm not gonna tell you not to buy from them. I was just expecting a lot more for the price and 7 or 8 weeks I waited to get it. Whoever you buy from, I wouldn't suggest spending $3k on a kit. You can easily save thousands by buying just the hotside and piecing the rest together. That's what me and Bentley did. The hot side was less than $900, we got all the cold side piping for $100 on ebay, intercooler was like $180, cheapo wastegate and bov. It's a lot cheaper that way.
i'm not sure how easy thats going to be really though i mean i have never done major work to a mustang before just minor **** so i would like to buy a kit and make sure everything is there
B & G. Best kit for the money. There kit right now is like $2500 with the stage one kit. Now it comes standard with a T-70. Best kit out there period, never ever heard a comlaint about customer service, product, or quality.