One of my gripes about this kit is they did not redo the front bumper. On the Boss and regular Mustangs in 71 they had a narrow chrome front bumper. Only the Mach1's had the urethane front bumper. Of course a rear spoiler looks like it belongs on a Boss (and the front too). The louvers were not offered by Ford (only for 69/70) and there is one minor flaw in the kit ( no BOSS 351 engine) or anything close to it much less a ram air setup. I guess that is all to be expected when they use a 71 Fastback kit that was updated to a 73 and give you some decals and the proclaim it to be a Boss, At least they did get the grill correct for a Boss/Mach1/Sprint but that's about it.