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MSD 8481 Cap & Rotor fitment issues

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  • MSD 8481 Cap & Rotor fitment issues

    I'm replacing the cap and rotor and I noticed the MSD rotor looks different then the stock one. The recess on the bottom that fits over the rubber spacer on the MSD rotor is about a .100in more shallow then the stock one so it won't sit flush or even get the screws to thread. If I remove the rubber spacer the rotor sits too low and actually rubs on the isolator. Has anyone ran into this problem? I'm not sure if the opti unit is stock or aftermarket due to the fact that I bought the car used. Thanks in advance for the help
    sigpic1994 Black Camaro Z28 M6
    Fully Rebuilt T56 all normal upgrades,kelvar blockers,billet keys,steel 3rd shift fork
    Fresh 350ci lower
    Doug Rippie Motorsports CNC ported Heads/Intake 2.02/1.60 Ferrea valves
    Lloyd Elliot custom grind cam
    Comp Cam 1.6 roller rockers
    Pacesetter long tube coated headers
    58mm throttle body
    MSD opti cap/rotor/OTVC wires
    custom tune
    42lbs injectors
    Trick Flow elbow
    K&N FIPK
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