I would say the CDC upgrade is a must if your ordering new. That being said I personally would not upgrade from the 2.5s you have now. I think the 2.5s feel like the CDCs on level 7 which is a good setting for most circumstances. But if you have the cash let it rain, they are the best.
Just got word back from the doc, loves the brakes even more than I thought he would. Coming from a guy that races Porsche 911s he could not be happier. No BS coming from me eather this is hands down amazing to drive, well worth the money.
I just put 22x11AMFs on a customers truck last week. No rubbing here. I'll have JD put some pics up. I think it's the best fitment on stock height trucks I've seen.
They are custom boxes out of my ecsb duramax. They were under the seat. We cut the legs off of the boxes and they fit perfect. I can get measurements if your interested. I'm not a fan of shallow mount subs so I had to find a way to make these work.
I just put in 2 JL 10w3 in my truck with a JL HD amp. Hits way harder than that shallow mount junk. Tucked up real nice behind the seat. Everyone said it wouldn't work but the boxes I had from my duramax fit perfect.
There are waaayyyy to many factors for us to know. Engine problems, tune, tranny. On and on. All I'm saying is I've been on that dyno multiple times and its pretty close on every high hp truck I've seen.