...I've got a 6-gun in my 05',had one in my 04',never had any concerns with either one...even pushed 3 kits on my bow-tie buds! I absolutely believe its one of the best products out there for reliability. I've driven trucks with more power but i'm not sure how long they'll stay together...I have 52,000 miles on the 05 and had 45,000 on the 04 all under banks power! Your heads will even stay bolted down maxing out @ 32 lbs of boost. I've worked my trucks hard for work and play and never had a problem. 100+ rear wheel hp with saftey built in is nothing to beepbeepbeepbeepbeep about...still make all my buds and their 5.0's look bad!