Torx head stainless steel bolts ... IMO, it's much less likely that a thief would carry a Torx driver set. Use some flexible epoxy to bond the lip to the bumper as well, and you should be well-defended against all but the most brazen thieves.
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:: :ToDspin: - supermod
- but who gives a shit?
:: HAN Integra FAQ: If, by some miracle, yours hasn't been stolen... check it out!