Lingenfelter L320061410 Lingenfelter High Capacity Intercooler Heat Exchanger Camaro SS & ZL1 v1.1 - Manual (Page 13)

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37. Once the wires are routed in a suitable
position. Hold the relays up to the car and
mark the centers of the holes in the brackets
that hold the relays. Move the relays away,
and using a punch make an indent where
the hole is suppose to be.
38. Using a 3/16” drill bit, drill out the three
holes, be careful not to drill through the back
of the cross member.
39. Attach the relays using the supplied self
tapping screws.
12.
40. Remove the fuse and relay center cover.