not sure how the site here feels for 4wp.... but they pretty much suck.... their guys know almost nothing and they always get the wrong part... i have bought stuff from them, but only when i knew the exact part number.....
that said, they are the main supplier for pro-comps... i actually got pro-comp es3000 for the erar of my truck from summit racing... they are a lot better than the worn out shocks i had on my truck