i just bought a set of used flowtech afterburner headers and i the original owner tells me that in order to install them with his motor he needed to take a grinder to a notch thats on the subframe and bend it? i dont know about if you guys have come across this but i kinda dont want to cut my subframe lol
thanks
-brian

 

did you try installing them? If you have issues typically it's worn motor mounts that need replacement. I've cut stock kmembers before, but never the subframes, although using a hammer to make 1/8" of room wouldn't hurt much.