A lot of mfg's will use Loc-tite on the bolts. They sometimes use slightly different colored screws or bolts to see if a unit has been tampered with. Every colored screw has to be put back in the same place.

M80's VP150 QS8's Earthquake SuperNova MKV-15
Integra DTR-7.4 Outlaw 755 Outlaw M200's Outlaw ICBM