There is no turbo kits out for 8.1 that I know of. I talk to ProTurboKits over a year ago and they told me $4500-$6000 turnkey depending on what I wanted.

 

The non-intercooled 8.1 Whipple is good for about a 100hp increase while the intercooled version would add 35hp to that. The complete Raylar package should be good for about 130hp so it would be close. I'll see what parts I can get in the next few weeks. I want to have these upgrades on the truck before I stop towing for this year.

This would have been a sweet combo if used with the Whipple on my Suburban. The HD should be almost as quick as that when it's done.