They are back in stock for the 5.7 and they are being drop shipped to me from Gibson directly (GP314S-C). My question is, those of you that have the Gibson Headers, did you run into any problems with the install? Or do they just bolt on to where the existing exhaust manifolds are without any space problems, concerns or modifications? I plan on putting them on next week and could surely use the benefit of anyone's experience so I don't have to reinvent the wheel... Thanks