I have drilled Zimmerman rotors and have never been told this nor have observed this.
What rotors do you have??
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"The Rodney Dangerfield of Porsche mods"
2000 2.7 Lapis Blue Boxster, Sports Pkg, Lit, Tip, Exhaust, De amber'fied
1983 911 SC Coupe 3.0 Gaurds Red (restoration, in pieces)
199? 993 Coupe Gaurds Red (lurking for....)
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