I'm pretty sure my hittin the fender problem has a lot to do with the road I use, even in a stock vehicle it is such a big dip and bottoms out the suspension in whatever you're in... but honestly I think it improved my chances of not hittin the fender as bad. The Nitro Drop 2's were SOFT and was lettin the engine weight dip the front end... i went over the rail road tracks in town earlier, the truck didnt nosedive NEARLY as bad.
I think the Belltech Street Performance are just beefier and definitely stronger than the Nitros, the nitros were just too soft for such a heavy motor. I easily compressed the nitros whereas the street performance ones, i couldnt compress with all my weight ontop of one shock hahah, i recommend the Belltech Street Performance ones for SURE!