I originally put my headers on with regular bolts, tightened 'em good and never checked them, pulled them the next year, only had one bolt that wasn't completely tight but I'd already ordered the Stage 8's so I installed them anyway.
The Stage 8's aren't bad to install but you have to be VERY CAREFUL with the clips and tabs. They only give you 16 clips and 16 tabs so if you lose one (which is very easy to do, I almost did), you're screwed.
But, you can put on the tabs and push the clips on with your finger if you align it to the flats of the bolt.
You honestly probably don't need them though.
2005 Mustang GT
CMS Stage 1 cams, Lito Tune, C&L Racer, CMDP, SR UDP, JBA LT's & catted H, FRPP Touring AB, Koni STR.T, BMR springs, J&M upper/mount, BMR lowers & brackets, J&M pb, Steeda Tri-Ax, Brembos
2009 Ranger XL SCab-4.0, auto, 4WD