Which bumper is that? The "buddy club" one??
The problem with the joy tuning one too it it is really 'flimsy' in a way. The centre bit moves really bad, god knows what it looks like from back when im driving. Also the centre parts leave about 1-2" clearance so needs shaving, this one should be ok.
The bumper needs supports doing for it but my way is basically cut some out, try mesh on it and try to keep it still a little more!
Oh and no offence taken!lol Didnt even like it much when i bought it!LOL