Stock 240Z drums have a rear lip that fouls TR backing plates. The lip
is machined off of the TR ones from Autospecialty drums. As for the stud
hole sizes, a drill will take care of any such problems (if they exist),
although I think that the Autospecialty drums have 12mm holes, which are
slightly larger than the stock TR6 drum stud holes (TR6 has 7/16" studs
stock - does TR4 have larger studs?)
Randall wrote:
>> TR4 and solid axle TR4A take bigger stud holes than the TR6 ... not sure but
>> there may also be an issue with the backing plate hitting the drum. At
>least it
>> hits on 240Z drums (which my local auto parts house sells for about $50
>each).
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