If you don't have pre-drilled holes, there's actually no need to drill. These rivets are self-tapping. As long as you use a proper rivet gun, that spike will pierce the bumper cover and create the hole as it inserts the rivet. Then afterwards, the spike just drops out and you toss it away. That's how it worked on my car anyway.
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"There are no small accidents on this circuit." -- Ayrton Senna
316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10)
Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.
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