My 08 D8 has SLP single and SLP high flow intake, otherwise basically stock, no PCV / PC5 at this point, ran it all last season that way and it is fine. 2010 update and flash installed. As with any 08-10 800 CFI, just don't stay too long in the midrange without varying the throttle some. Don't have to get too crazy with the throttle, just vary it.
I bought a PC5 so I can tune it better, get some more top end too. Can get you into trouble though if you don't know what you are doing. I will start with the SLP map for my setup (after synching the throttle position sensor) and go from there.
With that pipe, you can repair dents, I believe they spot-weld a rod to it, pull it out, then cut it off. Although 1/4 inch dent might not make any difference.
Slap it on there and ride it! While the pipes / y-pipe is off, look in there with a flashlight and turn the engine over a few rotations and see if you have any piston problems coming on.
Don't forget to follow the instructions (you can download them from the SLP site) and make sure the mount / bracket you have will work, and reroute the wiring. Wax the pipe per instructions too, while you can still get at it (mine is getting rusty but that was the former owner's fault, and my fault for buying it basically sight unseen, but i got a good price on it so decided to just run it, maybe paint it with high temp paint)...
