S60 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2004)
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Pre drill the four holes from the inside. Use a Dia. 3 mm (1/8 inch.) diameter drill bit
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Drill out the holes. Use a Dia. 9 mm (3/8 inch.) diameter drill bit.
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Enlarge the holes in the bumper casing. Use a Dia. 31 mm (17/32 inch.) diameter hole cutter.