i put a 400ex bumper on my 300ex and it wasnt too hard. just had to make some spacers for the bottom mounts and bolt it on with slightly longer (maybe 1/2 inch) bolts. as for the blingstar bumper, check the measurements on your frame for the bumper mounts, like distance between left and right sides for top and bottom, and distance from top and bottom mounts. write down (or draw) those measurements, then look at a different quad (like the 660 or yfz450) and take those measurements. if there isnt a whole lot of difference, you wouldnt even have to cut, maybe just bend some stuff around (the bumper, NOT the frame) or make spacers. dont be afraid to go to the local dealership and take some measurements on quads there. they shouldnt mind (unless they are dicks!). then proceed with caution and take your time. hope it works out for you and you arent out $115 if it doesnt work. i like that bumper better than the ac racing one as well, but im running the alba bumper and love it.