I'm not sure about it being a blower cam but the lift and duration is pretty big. You'll surely need springs, and nice to get retainers.
The issue is a cam is the heart of the engine. You want to build your engine around it. As stock your intake manifold and exhaust are generally setup for the lower end of the middle range. This cam is set for the upper end of the upper end haha.
Honestly I'd only get something this large if you have or plan on quicky getting headers and porting done. That'll take the rest of the engine to the upper end to play along with the cam. No doubt you'll get gains as-is, but you'll be shafting yourself out of HP and it'll probably suffer/run nasty in the upper end. Think of it like having 15lb lungs but breathing through a straw.
Interesting to note that Intense contradicts itself reguarding its cam.
"The new Stage 1X Cam is the IDEAL aftermarket cam for use with stock heads, lifters, rocker arms, springs, retainers, and pushrods."
So I can stay stock? Scroll down:
-We recommend that a new timing chain and timing chain tensioner be installed in conjunction with any new 3800 cam
-We recommend CompCams "OE R Series" Hydraulic Roller Lifters, High Load Valvesprings, and Valvespring Retainers with any aftermarket camshaft
-We recommend INTENSE™ High-Performance Pushrods with any aftermarket camshaft
-No PCM changes are required, however the INTENSE™ Stage 1X Normally Aspirated Cam may set an occasional *.E.*. light after extended idle periods
-Higher WOT shift points (6,300 to 6,600 RPM) and rev limiter settings will further increase the performance of the Stage 1X Cam
Oh wait...guess not.