My truck is heavy, I think I can take him off the line, but I'm not sure after he starts building boost, I know I can take him stock, I have 4.10s posi, and 33 pro comp m/ts I'm making all kinds of tracktion lol. All they do is bark off the line, and bark again at second. The nos kit was gave to me from a friend he used it to cool his boost on his mustang but he put it on meth